121600511604 has 288 divisors, whose sum is σ = 375299119104. Its totient is φ = 33940840320.

The previous prime is 121600511519. The next prime is 121600511647. The reversal of 121600511604 is 406115006121.

121600511604 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 0 + 0 + 51 + 1 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 114393177 + ... + 114394239.

Almost surely, 2^121600511604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121600511604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187649559552).

121600511604 is an abundant number, since it is smaller than the sum of its proper divisors (253698607500).

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

121600511604 is a wasteful number, since it uses less digits than its factorization.

121600511604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1915 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 121600511604 its reverse (406115006121), we get a palindrome (527715517725).

The spelling of 121600511604 in words is "one hundred twenty-one billion, six hundred million, five hundred eleven thousand, six hundred four".