Search a number
-
+
121213433401 = 179677170019
BaseRepresentation
bin111000011100011100…
…0100011011000111001
3102120212120110102012021
41300320320203120321
53441221114332101
6131403520314441
711520532120054
oct1607070433071
9376776412167
10121213433401
1147451906645
121b5aa172a21
13b5797030b8
145c1c571a9b
1532467965a1
hex1c38e23639

121213433401 has 4 divisors (see below), whose sum is σ = 121890603600. Its totient is φ = 120536263204.

The previous prime is 121213433359. The next prime is 121213433449. The reversal of 121213433401 is 104334312121.

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.

It is a cyclic number.

It is not a de Polignac number, because 121213433401 - 233 = 112623498809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121213433701) 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, 338584831 + ... + 338585188.

It is an arithmetic number, because the mean of its divisors is an integer number (30472650900).

Almost surely, 2121213433401 is an apocalyptic number.

It is an amenable number.

121213433401 is a deficient number, since it is larger than the sum of its proper divisors (677170199).

121213433401 is an equidigital number, since it uses as much as digits as its factorization.

121213433401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677170198.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 121213433401 its reverse (104334312121), we get a palindrome (225547745522).

The spelling of 121213433401 in words is "one hundred twenty-one billion, two hundred thirteen million, four hundred thirty-three thousand, four hundred one".

Divisors: 1 179 677170019 121213433401