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120101801 = 811148091
BaseRepresentation
bin1110010100010…
…01101110101001
322100222210200212
413022021232221
5221221224201
615530110505
72655564011
oct712115651
9270883625
10120101801
1161881296
123427b435
131bb61371
1411d44c41
15a825abb
hex7289ba9

120101801 has 4 divisors (see below), whose sum is σ = 120250704. Its totient is φ = 119952900.

The previous prime is 120101771. The next prime is 120101803. The reversal of 120101801 is 108101021.

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: 108101021 = 715443003.

It is a cyclic number.

It is not a de Polignac number, because 120101801 - 222 = 115907497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120101803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73235 + ... + 74856.

It is an arithmetic number, because the mean of its divisors is an integer number (30062676).

Almost surely, 2120101801 is an apocalyptic number.

It is an amenable number.

120101801 is a deficient number, since it is larger than the sum of its proper divisors (148903).

120101801 is an equidigital number, since it uses as much as digits as its factorization.

120101801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148902.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 120101801 is about 10959.0967237268. The cubic root of 120101801 is about 493.3818548067.

Adding to 120101801 its reverse (108101021), we get a palindrome (228202822).

The spelling of 120101801 in words is "one hundred twenty million, one hundred one thousand, eight hundred one".

Divisors: 1 811 148091 120101801