21313220311248 has 40 divisors (see below), whose sum is σ = 55059584794368. Its totient is φ = 7104350986752.

The previous prime is 21313220311247. The next prime is 21313220311333. The reversal of 21313220311248 is 84211302231312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313220311247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4677336 + ... + 8031432.

Almost surely, 2^{21313220311248} is an apocalyptic number.

It is an amenable number.

21313220311248 is an abundant number, since it is smaller than the sum of its proper divisors (33746364483120).

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

21313220311248 is a wasteful number, since it uses less digits than its factorization.

21313220311248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486491 (or 3486485 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 21313220311248 in words is "twenty-one trillion, three hundred thirteen billion, two hundred twenty million, three hundred eleven thousand, two hundred forty-eight".