222122320020 has 36 divisors (see below), whose sum is σ = 673771037940. Its totient is φ = 59232618624.

The previous prime is 222122320003. The next prime is 222122320033. The reversal of 222122320020 is 20023221222.

222122320020 is a `hidden beast` number, since 2 + 221 + 223 + 200 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58417923204 + 163704396816 = 241698^2 + 404604^2 .

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 = 222122319975 and 222122320002.

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, 617006265 + ... + 617006624.

It is an arithmetic number, because the mean of its divisors is an integer number (18715862165).

Almost surely, 2^222122320020 is an apocalyptic number.

222122320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222122320020 is an abundant number, since it is smaller than the sum of its proper divisors (451648717920).

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

222122320020 is a wasteful number, since it uses less digits than its factorization.

222122320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234012904 (or 1234012899 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 222122320020 its reverse (20023221222), we get a palindrome (242145541242).

The spelling of 222122320020 in words is "two hundred twenty-two billion, one hundred twenty-two million, three hundred twenty thousand, twenty".