12121764628 has 24 divisors (see below), whose sum is σ = 22387921920. Its totient is φ = 5726882880.

The previous prime is 12121764623. The next prime is 12121764659. The reversal of 12121764628 is 82646712121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121764623) 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, 179113 + ... + 237328.

It is an arithmetic number, because the mean of its divisors is an integer number (932830080).

Almost surely, 2^12121764628 is an apocalyptic number.

It is an amenable number.

12121764628 is a deficient number, since it is larger than the sum of its proper divisors (10266157292).

12121764628 is a wasteful number, since it uses less digits than its factorization.

12121764628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416847 (or 416845 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The spelling of 12121764628 in words is "twelve billion, one hundred twenty-one million, seven hundred sixty-four thousand, six hundred twenty-eight".