21312100231102 has 8 divisors (see below), whose sum is σ = 31968220241736. Its totient is φ = 10656026817192.

The previous prime is 21312100231091. The next prime is 21312100231109. The reversal of 21312100231102 is 20113200121312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21312100231102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312100231109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10482373 + ... + 12349264.

It is an arithmetic number, because the mean of its divisors is an integer number (3996027530217).

Almost surely, 2^{21312100231102} is an apocalyptic number.

21312100231102 is a deficient number, since it is larger than the sum of its proper divisors (10656120010634).

21312100231102 is a wasteful number, since it uses less digits than its factorization.

21312100231102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23298362.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21312100231102 its reverse (20113200121312), we get a palindrome (41425300352414).

The spelling of 21312100231102 in words is "twenty-one trillion, three hundred twelve billion, one hundred million, two hundred thirty-one thousand, one hundred two".