21211132400000 has 96 divisors (see below), whose sum is σ = 52817311506960. Its totient is φ = 8484452800000.

The previous prime is 21211132399997. The next prime is 21211132400039. The reversal of 21211132400000 is 423111212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26113916 + ... + 26913915.

Almost surely, 2^{21211132400000} is an apocalyptic number.

21211132400000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211132400000 is an abundant number, since it is smaller than the sum of its proper divisors (31606179106960).

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

21211132400000 is an frugal number, since it uses more digits than its factorization.

21211132400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53027870 (or 53027838 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21211132400000 its reverse (423111212), we get a palindrome (21211555511212).

The spelling of 21211132400000 in words is "twenty-one trillion, two hundred eleven billion, one hundred thirty-two million, four hundred thousand".