121550523604 has 12 divisors (see below), whose sum is σ = 213021255328. Its totient is φ = 60687307800.

The previous prime is 121550523593. The next prime is 121550523629. The reversal of 121550523604 is 406325055121.

It is a super-2 number, since 2×121550523604² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121550523604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21985392 + ... + 21990919.

Almost surely, 2^121550523604 is an apocalyptic number.

It is an amenable number.

121550523604 is a deficient number, since it is larger than the sum of its proper divisors (91470731724).

121550523604 is a wasteful number, since it uses less digits than its factorization.

121550523604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43977006 (or 43977004 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 121550523604 its reverse (406325055121), we get a palindrome (527875578725).

The spelling of 121550523604 in words is "one hundred twenty-one billion, five hundred fifty million, five hundred twenty-three thousand, six hundred four".