21202022202012 has 96 divisors (see below), whose sum is σ = 56330408232000. Its totient is φ = 6892332134400.

The previous prime is 21202022201963. The next prime is 21202022202037. The reversal of 21202022202012 is 21020222020212.

21202022202012 is a `hidden beast` number, since 21 + 20 + 202 + 220 + 201 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10692364 + ... + 12519212.

It is an arithmetic number, because the mean of its divisors is an integer number (586775085750).

Almost surely, 2^{21202022202012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202022202012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28165204116000).

21202022202012 is an abundant number, since it is smaller than the sum of its proper divisors (35128386029988).

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

21202022202012 is a wasteful number, since it uses less digits than its factorization.

21202022202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829524 (or 1829516 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21202022202012 its reverse (21020222020212), we get a palindrome (42222244222224).

The spelling of 21202022202012 in words is "twenty-one trillion, two hundred two billion, twenty-two million, two hundred two thousand, twelve".