22121210010000 has 100 divisors (see below), whose sum is σ = 71410215503792. Its totient is φ = 5898989328000.

The previous prime is 22121210009929. The next prime is 22121210010023. The reversal of 22121210010000 is 1001212122.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 368656834 + ... + 368716833.

Almost surely, 2^{22121210010000} is an apocalyptic number.

22121210010000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121210010000 is an abundant number, since it is smaller than the sum of its proper divisors (49289005493792).

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

22121210010000 is an equidigital number, since it uses as much as digits as its factorization.

22121210010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737373698 (or 737373677 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22121210010000 its reverse (1001212122), we get a palindrome (22122211222122).

The spelling of 22121210010000 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred ten million, ten thousand".