121664025112 has 24 divisors (see below), whose sum is σ = 265364137260. Its totient is φ = 52141724880.

The previous prime is 121664025107. The next prime is 121664025121. The reversal of 121664025112 is 211520466121.

It is a happy number.

It is a super-2 number, since 2×121664025112² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155183314 + ... + 155184097.

Almost surely, 2^121664025112 is an apocalyptic number.

It is an amenable number.

121664025112 is an abundant number, since it is smaller than the sum of its proper divisors (143700112148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121664025112 is a wasteful number, since it uses less digits than its factorization.

121664025112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310367431 (or 310367420 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 121664025112 in words is "one hundred twenty-one billion, six hundred sixty-four million, twenty-five thousand, one hundred twelve".