21312102310 has 8 divisors (see below), whose sum is σ = 38361784176. Its totient is φ = 8524840920.

The previous prime is 21312102281. The next prime is 21312102337. The reversal of 21312102310 is 1320121312.

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

It is a super-2 number, since 2×21312102310² (a number of 21 digits) contains 22 as substring.

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, 1065605106 + ... + 1065605125.

It is an arithmetic number, because the mean of its divisors is an integer number (4795223022).

Almost surely, 2^21312102310 is an apocalyptic number.

21312102310 is a deficient number, since it is larger than the sum of its proper divisors (17049681866).

21312102310 is a wasteful number, since it uses less digits than its factorization.

21312102310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131210238.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21312102310 its reverse (1320121312), we get a palindrome (22632223622).

The spelling of 21312102310 in words is "twenty-one billion, three hundred twelve million, one hundred two thousand, three hundred ten".