21002020101012 has 24 divisors (see below), whose sum is σ = 49808069530912. Its totient is φ = 6885908229600.

The previous prime is 21002020100983. The next prime is 21002020101053. The reversal of 21002020101012 is 21010102020012.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 14345641414 + ... + 14345642877.

Almost surely, 2^{21002020101012} is an apocalyptic number.

It is an amenable number.

21002020101012 is an abundant number, since it is smaller than the sum of its proper divisors (28806049429900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21002020101012 is a wasteful number, since it uses less digits than its factorization.

21002020101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28691284359 (or 28691284357 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21002020101012 its reverse (21010102020012), we get a palindrome (42012122121024).

The spelling of 21002020101012 in words is "twenty-one trillion, two billion, twenty million, one hundred one thousand, twelve".