222221012120100 has 288 divisors, whose sum is σ = 827640799543040. Its totient is φ = 50097574241280.

The previous prime is 222221012120087. The next prime is 222221012120101. The reversal of 222221012120100 is 1021210122222.

It is a happy number.

222221012120100 is a `hidden beast` number, since 2 + 222 + 210 + 12 + 120 + 100 = 666.

222221012120100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (222221012120101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 79152667 + ... + 81912066.

Almost surely, 2^{222221012120100} is an apocalyptic number.

222221012120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222221012120100 is an abundant number, since it is smaller than the sum of its proper divisors (605419787422940).

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

222221012120100 is a wasteful number, since it uses less digits than its factorization.

222221012120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161064836 (or 161064823 counting only the distinct ones).

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

Adding to 222221012120100 its reverse (1021210122222), we get a palindrome (223242222242322).

The spelling of 222221012120100 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, twelve million, one hundred twenty thousand, one hundred".