21202010022222 has 48 divisors (see below), whose sum is σ = 45984259666800. Its totient is φ = 7060172688000.

The previous prime is 21202010022161. The next prime is 21202010022253. The reversal of 21202010022222 is 22222001020212.

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 = 21202010022195 and 21202010022204.

It is a congruent number.

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, 539457972 + ... + 539497272.

It is an arithmetic number, because the mean of its divisors is an integer number (958005409725).

Almost surely, 2^{21202010022222} is an apocalyptic number.

21202010022222 is an abundant number, since it is smaller than the sum of its proper divisors (24782249644578).

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

21202010022222 is a wasteful number, since it uses less digits than its factorization.

21202010022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68929 (or 68926 counting only the distinct ones).

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

Adding to 21202010022222 its reverse (22222001020212), we get a palindrome (43424011042434).

The spelling of 21202010022222 in words is "twenty-one trillion, two hundred two billion, ten million, twenty-two thousand, two hundred twenty-two".