21231323102 has 32 divisors (see below), whose sum is σ = 36646145280. Its totient is φ = 9123814080.

The previous prime is 21231323101. The next prime is 21231323107. The reversal of 21231323102 is 20132313212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231323101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151418 + ... + 255714.

It is an arithmetic number, because the mean of its divisors is an integer number (1145192040).

Almost surely, 2^21231323102 is an apocalyptic number.

21231323102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21231323102 is a deficient number, since it is larger than the sum of its proper divisors (15414822178).

21231323102 is a wasteful number, since it uses less digits than its factorization.

21231323102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104816.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21231323102 its reverse (20132313212), we get a palindrome (41363636314).

The spelling of 21231323102 in words is "twenty-one billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred two".