121022573406 has 16 divisors (see below), whose sum is σ = 276623025024. Its totient is φ = 34577878104.

The previous prime is 121022573387. The next prime is 121022573407. The reversal of 121022573406 is 604375220121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022573407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440744880 + ... + 1440744963.

It is an arithmetic number, because the mean of its divisors is an integer number (17288939064).

Almost surely, 2^121022573406 is an apocalyptic number.

121022573406 is an abundant number, since it is smaller than the sum of its proper divisors (155600451618).

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

121022573406 is a wasteful number, since it uses less digits than its factorization.

121022573406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881489855.

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 121022573406 its reverse (604375220121), we get a palindrome (725397793527).

The spelling of 121022573406 in words is "one hundred twenty-one billion, twenty-two million, five hundred seventy-three thousand, four hundred six".