121044402251 has 4 divisors (see below), whose sum is σ = 121045741104. Its totient is φ = 121043063400.

The previous prime is 121044402233. The next prime is 121044402263. The reversal of 121044402251 is 152204440121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121044402251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121044402251.

It is not an unprimeable number, because it can be changed into a prime (121044402751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523160 + ... + 718181.

It is an arithmetic number, because the mean of its divisors is an integer number (30261435276).

Almost surely, 2^121044402251 is an apocalyptic number.

121044402251 is a deficient number, since it is larger than the sum of its proper divisors (1338853).

121044402251 is an equidigital number, since it uses as much as digits as its factorization.

121044402251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338852.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 121044402251 its reverse (152204440121), we get a palindrome (273248842372).

The spelling of 121044402251 in words is "one hundred twenty-one billion, forty-four million, four hundred two thousand, two hundred fifty-one".