121044655165 has 48 divisors (see below), whose sum is σ = 172762377984. Its totient is φ = 81142454400.

The previous prime is 121044655163. The next prime is 121044655219. The reversal of 121044655165 is 561556440121.

It is not a de Polignac number, because 121044655165 - 2¹ = 121044655163 is a prime.

It is a super-2 number, since 2×121044655165² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121044655163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10830030 + ... + 10841200.

It is an arithmetic number, because the mean of its divisors is an integer number (3599216208).

Almost surely, 2^121044655165 is an apocalyptic number.

It is an amenable number.

121044655165 is a deficient number, since it is larger than the sum of its proper divisors (51717722819).

121044655165 is a wasteful number, since it uses less digits than its factorization.

121044655165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12178 (or 12171 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 121044655165 in words is "one hundred twenty-one billion, forty-four million, six hundred fifty-five thousand, one hundred sixty-five".