1222122112100 has 18 divisors (see below), whose sum is σ = 2652004983474. Its totient is φ = 488848844800.

The previous prime is 1222122112093. The next prime is 1222122112111. The reversal of 1222122112100 is 12112212221.

It can be written as a sum of positive squares in 3 ways, for example, as 140455551076 + 1081666561024 = 374774^2 + 1040032^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6110610461 + ... + 6110610660.

It is an arithmetic number, because the mean of its divisors is an integer number (147333610193).

Almost surely, 2^{1222122112100} is an apocalyptic number.

1222122112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222122112100 is an abundant number, since it is smaller than the sum of its proper divisors (1429882871374).

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

1222122112100 is a wasteful number, since it uses less digits than its factorization.

1222122112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12221221135 (or 12221221128 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222122112100 its reverse (12112212221), we get a palindrome (1234234324321).

The spelling of 1222122112100 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, one hundred twelve thousand, one hundred".