222221100028 has 24 divisors (see below), whose sum is σ = 390700422000. Its totient is φ = 110593008000.

The previous prime is 222221100001. The next prime is 222221100029. The reversal of 222221100028 is 820001122222.

It is a junction number, because it is equal to n+sod(n) for n = 222221099981 and 222221100008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221100029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1424848 + ... + 1573096.

It is an arithmetic number, because the mean of its divisors is an integer number (16279184250).

Almost surely, 2^222221100028 is an apocalyptic number.

It is an amenable number.

222221100028 is a deficient number, since it is larger than the sum of its proper divisors (168479321972).

222221100028 is a wasteful number, since it uses less digits than its factorization.

222221100028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149997 (or 149995 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The spelling of 222221100028 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred thousand, twenty-eight".