172121038104 has 32 divisors (see below), whose sum is σ = 430312760640. Its totient is φ = 57372324000.

The previous prime is 172121038093. The next prime is 172121038123. The reversal of 172121038104 is 401830121271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1940239 + ... + 2027009.

It is an arithmetic number, because the mean of its divisors is an integer number (13447273770).

Almost surely, 2^172121038104 is an apocalyptic number.

It is an amenable number.

172121038104 is an abundant number, since it is smaller than the sum of its proper divisors (258191722536).

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

172121038104 is a wasteful number, since it uses less digits than its factorization.

172121038104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169431 (or 169427 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

Adding to 172121038104 its reverse (401830121271), we get a palindrome (573951159375).

The spelling of 172121038104 in words is "one hundred seventy-two billion, one hundred twenty-one million, thirty-eight thousand, one hundred four".