21201222020202 has 48 divisors (see below), whose sum is σ = 53917136063232. Its totient is φ = 5893776004320.

The previous prime is 21201222020183. The next prime is 21201222020221. The reversal of 21201222020202 is 20202022210212.

21201222020202 is a `hidden beast` number, since 21 + 201 + 2 + 220 + 20 + 202 = 666.

It is an interprime number because it is at equal distance from previous prime (21201222020183) and next prime (21201222020221).

It is a super-2 number, since 2×21201222020202² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2273828674 + ... + 2273837997.

It is an arithmetic number, because the mean of its divisors is an integer number (1123273667984).

Almost surely, 2^{21201222020202} is an apocalyptic number.

21201222020202 is an abundant number, since it is smaller than the sum of its proper divisors (32715914043030).

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

21201222020202 is a wasteful number, since it uses less digits than its factorization.

21201222020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547666723 (or 4547666720 counting only the distinct ones).

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

Adding to 21201222020202 its reverse (20202022210212), we get a palindrome (41403244230414).

The spelling of 21201222020202 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, twenty thousand, two hundred two".