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120212121001 = 717173160143
BaseRepresentation
bin110111111110100110…
…0110110010110101001
3102111021210022110210211
41233331030312112221
53432143300333001
6131120310541121
711453653111660
oct1577514662651
9374253273724
10120212121001
1146a88676835
121b36a9677a1
13b44a12675b
145b655a1dd7
1531d8906351
hex1bfd3365a9

120212121001 has 4 divisors (see below), whose sum is σ = 137385281152. Its totient is φ = 103038960852.

The previous prime is 120212120999. The next prime is 120212121019. The reversal of 120212121001 is 100121212021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100121212021 = 412441980781.

It is a cyclic number.

It is not a de Polignac number, because 120212121001 - 21 = 120212120999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120212122001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8586580065 + ... + 8586580078.

It is an arithmetic number, because the mean of its divisors is an integer number (34346320288).

Almost surely, 2120212121001 is an apocalyptic number.

It is an amenable number.

120212121001 is a deficient number, since it is larger than the sum of its proper divisors (17173160151).

120212121001 is an equidigital number, since it uses as much as digits as its factorization.

120212121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17173160150.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 120212121001 its reverse (100121212021), we get a palindrome (220333333022).

The spelling of 120212121001 in words is "one hundred twenty billion, two hundred twelve million, one hundred twenty-one thousand, one".

Divisors: 1 7 17173160143 120212121001