222221001020 has 96 divisors (see below), whose sum is σ = 477504720000. Its totient is φ = 86851657728.

The previous prime is 222221001017. The next prime is 222221001043. The reversal of 222221001020 is 20100122222.

It is a junction number, because it is equal to n+sod(n) for n = 222221000986 and 222221001004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85173476 + ... + 85176084.

It is an arithmetic number, because the mean of its divisors is an integer number (4974007500).

Almost surely, 2^222221001020 is an apocalyptic number.

222221001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221001020 is an abundant number, since it is smaller than the sum of its proper divisors (255283718980).

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

222221001020 is a wasteful number, since it uses less digits than its factorization.

222221001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255 (or 3253 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222221001020 its reverse (20100122222), we get a palindrome (242321123242).

The spelling of 222221001020 in words is "two hundred twenty-two billion, two hundred twenty-one million, one thousand, twenty".