21243211234212 has 96 divisors (see below), whose sum is σ = 57979170385920. Its totient is φ = 5981977797120.

The previous prime is 21243211234169. The next prime is 21243211234243.

21243211234212 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21243211234212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59738368 + ... + 60092919.

It is an arithmetic number, because the mean of its divisors is an integer number (603949691520).

Almost surely, 2^{21243211234212} is an apocalyptic number.

21243211234212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21243211234212 is an abundant number, since it is smaller than the sum of its proper divisors (36735959151708).

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

21243211234212 is a wasteful number, since it uses less digits than its factorization.

21243211234212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119831401 (or 119831399 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

It can be divided in two parts, 2124321 and 1234212, that added together give a palindrome (3358533).

The spelling of 21243211234212 in words is "twenty-one trillion, two hundred forty-three billion, two hundred eleven million, two hundred thirty-four thousand, two hundred twelve".