21112112210000 has 100 divisors (see below), whose sum is σ = 58416611475552. Its totient is φ = 7238438448000.

The previous prime is 21112112209987. The next prime is 21112112210039. The reversal of 21112112210000 is 1221121112.

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 (14).

It is a congruent number.

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, 150730802 + ... + 150870801.

Almost surely, 2^{21112112210000} is an apocalyptic number.

21112112210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112112210000 is an abundant number, since it is smaller than the sum of its proper divisors (37304499265552).

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

21112112210000 is an equidigital number, since it uses as much as digits as its factorization.

21112112210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301601638 (or 301601617 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112112210000 its reverse (1221121112), we get a palindrome (21113333331112).

The spelling of 21112112210000 in words is "twenty-one trillion, one hundred twelve billion, one hundred twelve million, two hundred ten thousand".