21131302 has 8 divisors (see below), whose sum is σ = 32079096. Its totient is φ = 10438272.

The previous prime is 21131293. The next prime is 21131317. The reversal of 21131302 is 20313112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 63483 + ... + 63814.

It is an arithmetic number, because the mean of its divisors is an integer number (4009887).

Almost surely, 2^21131302 is an apocalyptic number.

21131302 is a deficient number, since it is larger than the sum of its proper divisors (10947794).

21131302 is a wasteful number, since it uses less digits than its factorization.

21131302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127382.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 21131302 is about 4596.8795938114. The cubic root of 21131302 is about 276.4662269756.

Adding to 21131302 its reverse (20313112), we get a palindrome (41444414).

It can be divided in two parts, 211 and 31302, that added together give a palindrome (31513).

The spelling of 21131302 in words is "twenty-one million, one hundred thirty-one thousand, three hundred two".