21220122202000 has 80 divisors (see below), whose sum is σ = 52503517452672. Its totient is φ = 8290652361600.

The previous prime is 21220122201991. The next prime is 21220122202001. The reversal of 21220122202000 is 20222102212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (21220122202001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123286804 + ... + 123458803.

Almost surely, 2^{21220122202000} is an apocalyptic number.

21220122202000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220122202000 is an abundant number, since it is smaller than the sum of its proper divisors (31283395250672).

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

21220122202000 is a wasteful number, since it uses less digits than its factorization.

21220122202000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246745673 (or 246745657 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21220122202000 its reverse (20222102212), we get a palindrome (21240344304212).

The spelling of 21220122202000 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred two thousand".