21012323101102 has 4 divisors (see below), whose sum is σ = 31518484651656. Its totient is φ = 10506161550550.

The previous prime is 21012323101087. The next prime is 21012323101111. The reversal of 21012323101102 is 20110132321012.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21012323101102² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21012323101102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253080775274 + ... + 5253080775277.

It is an arithmetic number, because the mean of its divisors is an integer number (7879621162914).

Almost surely, 2^{21012323101102} is an apocalyptic number.

21012323101102 is a deficient number, since it is larger than the sum of its proper divisors (10506161550554).

21012323101102 is a wasteful number, since it uses less digits than its factorization.

21012323101102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506161550553.

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

Adding to 21012323101102 its reverse (20110132321012), we get a palindrome (41122455422114).

The spelling of 21012323101102 in words is "twenty-one trillion, twelve billion, three hundred twenty-three million, one hundred one thousand, one hundred two".