12021620502 has 16 divisors (see below), whose sum is σ = 24872318640. Its totient is φ = 3869027232.

The previous prime is 12021620441. The next prime is 12021620503. The reversal of 12021620502 is 20502612021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021620503) 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, 34544713 + ... + 34545060.

It is an arithmetic number, because the mean of its divisors is an integer number (1554519915).

Almost surely, 2^12021620502 is an apocalyptic number.

12021620502 is an abundant number, since it is smaller than the sum of its proper divisors (12850698138).

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

12021620502 is a wasteful number, since it uses less digits than its factorization.

12021620502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69089807.

The product of its (nonzero) digits is 480, while the sum is 21.

The spelling of 12021620502 in words is "twelve billion, twenty-one million, six hundred twenty thousand, five hundred two".