222111021000 has 128 divisors (see below), whose sum is σ = 755985260160. Its totient is φ = 53845088000.

The previous prime is 222111020959. The next prime is 222111021007. The reversal of 222111021000 is 120111222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (222111021007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3332319 + ... + 3398318.

It is an arithmetic number, because the mean of its divisors is an integer number (5906134845).

Almost surely, 2^222111021000 is an apocalyptic number.

222111021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111021000 is an abundant number, since it is smaller than the sum of its proper divisors (533874239160).

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

222111021000 is a wasteful number, since it uses less digits than its factorization.

222111021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730672 (or 6730658 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 222111021000 its reverse (120111222), we get a palindrome (222231132222).

The spelling of 222111021000 in words is "two hundred twenty-two billion, one hundred eleven million, twenty-one thousand".