21220201220022 has 48 divisors (see below), whose sum is σ = 53435857812480. Its totient is φ = 5960153367216.

The previous prime is 21220201220021. The next prime is 21220201220033. The reversal of 21220201220022 is 22002210202212.

21220201220022 is a `hidden beast` number, since 2 + 1 + 220 + 201 + 220 + 0 + 22 = 666.

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 = 21220201219977 and 21220201220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220201220021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1427232358 + ... + 1427247225.

It is an arithmetic number, because the mean of its divisors is an integer number (1113247037760).

Almost surely, 2^{21220201220022} is an apocalyptic number.

21220201220022 is an abundant number, since it is smaller than the sum of its proper divisors (32215656592458).

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

21220201220022 is a wasteful number, since it uses less digits than its factorization.

21220201220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854479657 (or 2854479654 counting only the distinct ones).

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

Adding to 21220201220022 its reverse (22002210202212), we get a palindrome (43222411422234).

The spelling of 21220201220022 in words is "twenty-one trillion, two hundred twenty billion, two hundred one million, two hundred twenty thousand, twenty-two".