21031322313012 has 96 divisors (see below), whose sum is σ = 53877594355200. Its totient is φ = 6332370038400.

The previous prime is 21031322312983. The next prime is 21031322313019.

21031322313012 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031322313019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14133439 + ... + 15550457.

It is an arithmetic number, because the mean of its divisors is an integer number (561224941200).

Almost surely, 2^{21031322313012} is an apocalyptic number.

21031322313012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21031322313012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26938797177600).

21031322313012 is an abundant number, since it is smaller than the sum of its proper divisors (32846272042188).

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

21031322313012 is a wasteful number, since it uses less digits than its factorization.

21031322313012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417757 (or 1417755 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

It can be divided in two parts, 2103132 and 2313012, that added together give a palindrome (4416144).

The spelling of 21031322313012 in words is "twenty-one trillion, thirty-one billion, three hundred twenty-two million, three hundred thirteen thousand, twelve".