21213200231212 has 24 divisors (see below), whose sum is σ = 41804312481792. Its totient is φ = 9331319749200.

The previous prime is 21213200231131. The next prime is 21213200231269.

21213200231212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 7776098428 + ... + 7776101155.

It is an arithmetic number, because the mean of its divisors is an integer number (1741846353408).

Almost surely, 2^{21213200231212} is an apocalyptic number.

21213200231212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21213200231212 is a deficient number, since it is larger than the sum of its proper divisors (20591112250580).

21213200231212 is a wasteful number, since it uses less digits than its factorization.

21213200231212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15552199629 (or 15552199627 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 21213200 and 231212, that added together give a palindrome (21444412).

The spelling of 21213200231212 in words is "twenty-one trillion, two hundred thirteen billion, two hundred million, two hundred thirty-one thousand, two hundred twelve".