21210121112000 has 56 divisors (see below), whose sum is σ = 52526864953680. Its totient is φ = 8484048441600.

The previous prime is 21210121111939. The next prime is 21210121112023. The reversal of 21210121112000 is 21112101212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325624570 + ... + 1325640569.

Almost surely, 2^{21210121112000} is an apocalyptic number.

21210121112000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210121112000 is an abundant number, since it is smaller than the sum of its proper divisors (31316743841680).

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

21210121112000 is an equidigital number, since it uses as much as digits as its factorization.

21210121112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651265166 (or 2651265146 counting only the distinct ones).

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

Adding to 21210121112000 its reverse (21112101212), we get a palindrome (21231233213212).

The spelling of 21210121112000 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-one million, one hundred twelve thousand".