222021000020 has 12 divisors (see below), whose sum is σ = 466244100084. Its totient is φ = 88808400000.

The previous prime is 222021000013. The next prime is 222021000049. The reversal of 222021000020 is 20000120222.

It can be written as a sum of positive squares in 2 ways, for example, as 67707162436 + 154313837584 = 260206^2 + 392828^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222020999965 and 222021000010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5550524981 + ... + 5550525020.

It is an arithmetic number, because the mean of its divisors is an integer number (38853675007).

Almost surely, 2^222021000020 is an apocalyptic number.

222021000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222021000020 is an abundant number, since it is smaller than the sum of its proper divisors (244223100064).

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

222021000020 is a wasteful number, since it uses less digits than its factorization.

222021000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101050010 (or 11101050008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 222021000020 its reverse (20000120222), we get a palindrome (242021120242).

The spelling of 222021000020 in words is "two hundred twenty-two billion, twenty-one million, twenty", and thus it is an aban number.