21202131344 has 20 divisors (see below), whose sum is σ = 41154245424. Its totient is φ = 10581680928.

The previous prime is 21202131323. The next prime is 21202131359. The reversal of 21202131344 is 44313120212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202522 + ... + 1220025.

Almost surely, 2^21202131344 is an apocalyptic number.

It is an amenable number.

21202131344 is a deficient number, since it is larger than the sum of its proper divisors (19952114080).

21202131344 is a wasteful number, since it uses less digits than its factorization.

21202131344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423102 (or 2423096 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21202131344 its reverse (44313120212), we get a palindrome (65515251556).

The spelling of 21202131344 in words is "twenty-one billion, two hundred two million, one hundred thirty-one thousand, three hundred forty-four".