21020231302 has 32 divisors (see below), whose sum is σ = 36890155584. Its totient is φ = 8797248000.

The previous prime is 21020231299. The next prime is 21020231359. The reversal of 21020231302 is 20313202012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1402 + ... + 205042.

It is an arithmetic number, because the mean of its divisors is an integer number (1152817362).

Almost surely, 2^21020231302 is an apocalyptic number.

21020231302 is a deficient number, since it is larger than the sum of its proper divisors (15869924282).

21020231302 is a wasteful number, since it uses less digits than its factorization.

21020231302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203824.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21020231302 its reverse (20313202012), we get a palindrome (41333433314).

The spelling of 21020231302 in words is "twenty-one billion, twenty million, two hundred thirty-one thousand, three hundred two".