21021020210012 has 12 divisors (see below), whose sum is σ = 36806552594616. Its totient is φ = 10504862325840.

The previous prime is 21021020209883. The next prime is 21021020210053. The reversal of 21021020210012 is 21001202012012.

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, 1411936418 + ... + 1411951305.

It is an arithmetic number, because the mean of its divisors is an integer number (3067212716218).

Almost surely, 2^{21021020210012} is an apocalyptic number.

It is an amenable number.

21021020210012 is a deficient number, since it is larger than the sum of its proper divisors (15785532384604).

21021020210012 is a wasteful number, since it uses less digits than its factorization.

21021020210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823889588 (or 2823889586 counting only the distinct ones).

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

Adding to 21021020210012 its reverse (21001202012012), we get a palindrome (42022222222024).

The spelling of 21021020210012 in words is "twenty-one trillion, twenty-one billion, twenty million, two hundred ten thousand, twelve".