222100021211220 has 72 divisors (see below), whose sum is σ = 673705217631264. Its totient is φ = 59226512326848.

The previous prime is 222100021211219. The next prime is 222100021211249. The reversal of 222100021211220 is 22112120001222.

It is a happy number.

222100021211220 is a `hidden beast` number, since 2 + 2 + 210 + 0 + 0 + 21 + 211 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 222100021211193 and 222100021211202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74891907 + ... + 77801013.

Almost surely, 2^{222100021211220} is an apocalyptic number.

222100021211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222100021211220 is an abundant number, since it is smaller than the sum of its proper divisors (451605196420044).

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

222100021211220 is a wasteful number, since it uses less digits than its factorization.

222100021211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333269 (or 3333264 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222100021211220 its reverse (22112120001222), we get a palindrome (244212141212442).

The spelling of 222100021211220 in words is "two hundred twenty-two trillion, one hundred billion, twenty-one million, two hundred eleven thousand, two hundred twenty".