222111211020 has 24 divisors (see below), whose sum is σ = 621911391024. Its totient is φ = 59229656256.

The previous prime is 222111210983. The next prime is 222111211037. The reversal of 222111211020 is 20112111222.

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 7 ways as a sum of consecutive naturals, for example, 1850926699 + ... + 1850926818.

It is an arithmetic number, because the mean of its divisors is an integer number (25912974626).

Almost surely, 2^222111211020 is an apocalyptic number.

222111211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111211020 is an abundant number, since it is smaller than the sum of its proper divisors (399800180004).

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

222111211020 is a wasteful number, since it uses less digits than its factorization.

222111211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701853529 (or 3701853527 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222111211020 its reverse (20112111222), we get a palindrome (242223322242).

The spelling of 222111211020 in words is "two hundred twenty-two billion, one hundred eleven million, two hundred eleven thousand, twenty".