21202022120220 has 36 divisors (see below), whose sum is σ = 64312800431880. Its totient is φ = 5653872565344.

The previous prime is 21202022120173. The next prime is 21202022120269. The reversal of 21202022120220 is 2202122020212.

21202022120220 is a `hidden beast` number, since 2 + 1 + 202 + 0 + 221 + 20 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 21202022120193 and 21202022120202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58894505710 + ... + 58894506069.

Almost surely, 2^{21202022120220} is an apocalyptic number.

21202022120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202022120220 is an abundant number, since it is smaller than the sum of its proper divisors (43110778311660).

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

21202022120220 is a wasteful number, since it uses less digits than its factorization.

21202022120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117789011794 (or 117789011789 counting only the distinct ones).

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

Adding to 21202022120220 its reverse (2202122020212), we get a palindrome (23404144140432).

The spelling of 21202022120220 in words is "twenty-one trillion, two hundred two billion, twenty-two million, one hundred twenty thousand, two hundred twenty".