1222111000100 has 36 divisors (see below), whose sum is σ = 2654548355844. Its totient is φ = 488371130880.

The previous prime is 1222111000027. The next prime is 1222111000109. The reversal of 1222111000100 is 10001112221.

It can be written as a sum of positive squares in 6 ways, for example, as 26220029476 + 1195890970624 = 161926^2 + 1093568^2 .

It is not an unprimeable number, because it can be changed into a prime (1222111000109) 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, 5812049 + ... + 6018648.

It is an arithmetic number, because the mean of its divisors is an integer number (73737454329).

Almost surely, 2^{1222111000100} is an apocalyptic number.

1222111000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222111000100 is an abundant number, since it is smaller than the sum of its proper divisors (1432437355744).

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

1222111000100 is a wasteful number, since it uses less digits than its factorization.

1222111000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11831744 (or 11831737 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1222111000100 its reverse (10001112221), we get a palindrome (1232112112321).

The spelling of 1222111000100 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, one hundred", and thus it is an aban number.