21221112212000 has 96 divisors (see below), whose sum is σ = 53024006730240. Its totient is φ = 8344572844800.

The previous prime is 21221112211961. The next prime is 21221112212011. The reversal of 21221112212000 is 21221112212.

It is a self number, because there is not a number n which added to its sum of digits gives 21221112212000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44723984 + ... + 45195983.

It is an arithmetic number, because the mean of its divisors is an integer number (552333403440).

Almost surely, 2^{21221112212000} is an apocalyptic number.

21221112212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221112212000 is an abundant number, since it is smaller than the sum of its proper divisors (31802894518240).

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

21221112212000 is an equidigital number, since it uses as much as digits as its factorization.

21221112212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89920051 (or 89920033 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221112212000 its reverse (21221112212), we get a palindrome (21242333324212).

21221112212000 divided by its reverse (21221112212) gives a cube (1000 = 10³).

The spelling of 21221112212000 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand".