21012210020012 has 12 divisors (see below), whose sum is σ = 37957540681536. Its totient is φ = 10167198396720.

The previous prime is 21012210019993. The next prime is 21012210020047. The reversal of 21012210020012 is 21002001221012.

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, 84726653183 + ... + 84726653430.

It is an arithmetic number, because the mean of its divisors is an integer number (3163128390128).

Almost surely, 2^{21012210020012} is an apocalyptic number.

It is an amenable number.

21012210020012 is a deficient number, since it is larger than the sum of its proper divisors (16945330661524).

21012210020012 is a wasteful number, since it uses less digits than its factorization.

21012210020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169453306648 (or 169453306646 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012210020012 its reverse (21002001221012), we get a palindrome (42014211241024).

It can be divided in two parts, 21012 and 210020012, that multiplied together give a palindrome (4412940492144).

The spelling of 21012210020012 in words is "twenty-one trillion, twelve billion, two hundred ten million, twenty thousand, twelve".