21011202344 has 16 divisors (see below), whose sum is σ = 42977459520. Its totient is φ = 9550546480.

The previous prime is 21011202341. The next prime is 21011202349. The reversal of 21011202344 is 44320211012.

It is a super-2 number, since 2×21011202344² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21011202341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119381744 + ... + 119381919.

It is an arithmetic number, because the mean of its divisors is an integer number (2686091220).

Almost surely, 2^21011202344 is an apocalyptic number.

It is an amenable number.

21011202344 is an abundant number, since it is smaller than the sum of its proper divisors (21966257176).

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

21011202344 is a wasteful number, since it uses less digits than its factorization.

21011202344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238763680 (or 238763676 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21011202344 its reverse (44320211012), we get a palindrome (65331413356).

The spelling of 21011202344 in words is "twenty-one billion, eleven million, two hundred two thousand, three hundred forty-four".