1201311113100 has 72 divisors (see below), whose sum is σ = 3972335420928. Its totient is φ = 274585396800.

The previous prime is 1201311113087. The next prime is 1201311113111. The reversal of 1201311113100 is 13111131021.

It is a super-2 number, since 2×1201311113100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1201311113100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286024356 + ... + 286028555.

Almost surely, 2^{1201311113100} is an apocalyptic number.

1201311113100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201311113100 is an abundant number, since it is smaller than the sum of its proper divisors (2771024307828).

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

1201311113100 is a wasteful number, since it uses less digits than its factorization.

1201311113100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572052935 (or 572052928 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 1201311113100 its reverse (13111131021), we get a palindrome (1214422244121).

The spelling of 1201311113100 in words is "one trillion, two hundred one billion, three hundred eleven million, one hundred thirteen thousand, one hundred".