1222220222100 has 108 divisors (see below), whose sum is σ = 3963084276060. Its totient is φ = 314686579200.

The previous prime is 1222220222081. The next prime is 1222220222101. The reversal of 1222220222100 is 12220222221.

1222220222100 is a `hidden beast` number, since 1 + 222 + 220 + 2 + 221 + 0 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 19960603524 + 1202259618576 = 141282^2 + 1096476^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222220222101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23388081 + ... + 23440280.

Almost surely, 2^{1222220222100} is an apocalyptic number.

1222220222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222220222100 is an abundant number, since it is smaller than the sum of its proper divisors (2740864053960).

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

1222220222100 is a wasteful number, since it uses less digits than its factorization.

1222220222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46828410 (or 46828400 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1222220222100 its reverse (12220222221), we get a palindrome (1234440444321).

The spelling of 1222220222100 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".