21202223312 has 40 divisors (see below), whose sum is σ = 41407532040. Its totient is φ = 10516746240.

The previous prime is 21202223309. The next prime is 21202223333. The reversal of 21202223312 is 21332220212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15983027776 + 5219195536 = 126424^2 + 72244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019288 + ... + 1039880.

It is an arithmetic number, because the mean of its divisors is an integer number (1035188301).

Almost surely, 2^21202223312 is an apocalyptic number.

It is an amenable number.

21202223312 is a deficient number, since it is larger than the sum of its proper divisors (20205308728).

21202223312 is a wasteful number, since it uses less digits than its factorization.

21202223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21111 (or 21105 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21202223312 its reverse (21332220212), we get a palindrome (42534443524).

The spelling of 21202223312 in words is "twenty-one billion, two hundred two million, two hundred twenty-three thousand, three hundred twelve".