21231422413212 has 48 divisors (see below), whose sum is σ = 54072506202624. Its totient is φ = 6430325616000.

The previous prime is 21231422413189. The next prime is 21231422413219.

21231422413212 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 21231422413212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231422413219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42736489 + ... + 43230432.

It is an arithmetic number, because the mean of its divisors is an integer number (1126510545888).

Almost surely, 2^{21231422413212} is an apocalyptic number.

21231422413212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21231422413212 is an abundant number, since it is smaller than the sum of its proper divisors (32841083789412).

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

21231422413212 is a wasteful number, since it uses less digits than its factorization.

21231422413212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85968810 (or 85968808 counting only the distinct ones).

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

It can be divided in two parts, 2123142 and 2413212, that added together give a palindrome (4536354).

The spelling of 21231422413212 in words is "twenty-one trillion, two hundred thirty-one billion, four hundred twenty-two million, four hundred thirteen thousand, two hundred twelve".