1311122100 has 36 divisors (see below), whose sum is σ = 3793514144. Its totient is φ = 349632480.

The previous prime is 1311122089. The next prime is 1311122117. The reversal of 1311122100 is 12211131.

It is a super-2 number, since 2×1311122100² = 3438082322216820000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2184904 + ... + 2185503.

Almost surely, 2^1311122100 is an apocalyptic number.

1311122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311122100 is an abundant number, since it is smaller than the sum of its proper divisors (2482392044).

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

1311122100 is a wasteful number, since it uses less digits than its factorization.

1311122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370424 (or 4370417 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1311122100 is about 36209.4200450656. The cubic root of 1311122100 is about 1094.4965054546.

Adding to 1311122100 its reverse (12211131), we get a palindrome (1323333231).

The spelling of 1311122100 in words is "one billion, three hundred eleven million, one hundred twenty-two thousand, one hundred".