222001202020 has 36 divisors (see below), whose sum is σ = 504822859380. Its totient is φ = 81969673344.

The previous prime is 222001202011. The next prime is 222001202021. The reversal of 222001202020 is 20202100222.

It can be written as a sum of positive squares in 6 ways, for example, as 46438526016 + 175562676004 = 215496^2 + 419002^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (222001202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32837035 + ... + 32843794.

It is an arithmetic number, because the mean of its divisors is an integer number (14022857205).

Almost surely, 2^222001202020 is an apocalyptic number.

222001202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222001202020 is an abundant number, since it is smaller than the sum of its proper divisors (282821657360).

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

222001202020 is a wasteful number, since it uses less digits than its factorization.

222001202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65680864 (or 65680849 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 222001202020 its reverse (20202100222), we get a palindrome (242203302242).

The spelling of 222001202020 in words is "two hundred twenty-two billion, one million, two hundred two thousand, twenty".