222021220100 has 36 divisors (see below), whose sum is σ = 481806597300. Its totient is φ = 88804700160.

The previous prime is 222021220061. The next prime is 222021220103. The reversal of 222021220100 is 1022120222.

It can be written as a sum of positive squares in 6 ways, for example, as 5641812544 + 216379407556 = 75112^2 + 465166^2 .

It is not an unprimeable number, because it can be changed into a prime (222021220103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4242896 + ... + 4294904.

Almost surely, 2^222021220100 is an apocalyptic number.

222021220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222021220100 is an abundant number, since it is smaller than the sum of its proper divisors (259785377200).

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

222021220100 is a wasteful number, since it uses less digits than its factorization.

222021220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94712 (or 94705 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222021220100 its reverse (1022120222), we get a palindrome (223043340322).

The spelling of 222021220100 in words is "two hundred twenty-two billion, twenty-one million, two hundred twenty thousand, one hundred".