1213132031100 has 108 divisors (see below), whose sum is σ = 4148176348680. Its totient is φ = 294092611200.

The previous prime is 1213132031081. The next prime is 1213132031107. The reversal of 1213132031100 is 11302313121.

1213132031100 is a `hidden beast` number, since 1 + 2 + 1 + 31 + 320 + 311 + 0 + 0 = 666.

It is a super-2 number, since 2×1213132031100² (a number of 25 digits) contains 22 as substring.

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 (1213132031107) 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, 61259395 + ... + 61279194.

Almost surely, 2^{1213132031100} is an apocalyptic number.

1213132031100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213132031100 is an abundant number, since it is smaller than the sum of its proper divisors (2935044317580).

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

1213132031100 is a wasteful number, since it uses less digits than its factorization.

1213132031100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122538620 (or 122538610 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1213132031100 its reverse (11302313121), we get a palindrome (1224434344221).

The spelling of 1213132031100 in words is "one trillion, two hundred thirteen billion, one hundred thirty-two million, thirty-one thousand, one hundred".