21212012120102 has 16 divisors (see below), whose sum is σ = 32061317151600. Its totient is φ = 10524908490720.

The previous prime is 21212012120063. The next prime is 21212012120147. The reversal of 21212012120102 is 20102121021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21630224 + ... + 22589612.

It is an arithmetic number, because the mean of its divisors is an integer number (2003832321975).

Almost surely, 2^{21212012120102} is an apocalyptic number.

21212012120102 is a deficient number, since it is larger than the sum of its proper divisors (10849305031498).

21212012120102 is a wasteful number, since it uses less digits than its factorization.

21212012120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043911.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21212012120102 its reverse (20102121021212), we get a palindrome (41314133141314).

The spelling of 21212012120102 in words is "twenty-one trillion, two hundred twelve billion, twelve million, one hundred twenty thousand, one hundred two".