21131333102 has 32 divisors (see below), whose sum is σ = 34773974784. Its totient is φ = 9551001600.

The previous prime is 21131333063. The next prime is 21131333123. The reversal of 21131333102 is 20133313112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564713 + ... + 3570635.

It is an arithmetic number, because the mean of its divisors is an integer number (1086686712).

Almost surely, 2^21131333102 is an apocalyptic number.

21131333102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21131333102 is a deficient number, since it is larger than the sum of its proper divisors (13642641682).

21131333102 is a wasteful number, since it uses less digits than its factorization.

21131333102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6824.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21131333102 its reverse (20133313112), we get a palindrome (41264646214).

It can be divided in two parts, 211 and 31333102, that added together give a palindrome (31333313).

The spelling of 21131333102 in words is "twenty-one billion, one hundred thirty-one million, three hundred thirty-three thousand, one hundred two".