222121102020 has 96 divisors (see below), whose sum is σ = 623784540288. Its totient is φ = 59056791552.

The previous prime is 222121101929. The next prime is 222121102033. The reversal of 222121102020 is 20201121222.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 35048292 + ... + 35054628.

It is an arithmetic number, because the mean of its divisors is an integer number (6497755628).

Almost surely, 2^222121102020 is an apocalyptic number.

222121102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222121102020 is an abundant number, since it is smaller than the sum of its proper divisors (401663438268).

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

222121102020 is a wasteful number, since it uses less digits than its factorization.

222121102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7989 (or 7987 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222121102020 its reverse (20201121222), we get a palindrome (242322223242).

The spelling of 222121102020 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred two thousand, twenty".