222123021020 has 48 divisors (see below), whose sum is σ = 494054261568. Its totient is φ = 83596170240.

The previous prime is 222123021017. The next prime is 222123021031. The reversal of 222123021020 is 20120321222.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 222123021020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 982574 + ... + 1187306.

It is an arithmetic number, because the mean of its divisors is an integer number (10292797116).

Almost surely, 2^222123021020 is an apocalyptic number.

222123021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222123021020 is an abundant number, since it is smaller than the sum of its proper divisors (271931240548).

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

222123021020 is a wasteful number, since it uses less digits than its factorization.

222123021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207950 (or 207948 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 222123021020 its reverse (20120321222), we get a palindrome (242243342242).

The spelling of 222123021020 in words is "two hundred twenty-two billion, one hundred twenty-three million, twenty-one thousand, twenty".