1231101111300 has 72 divisors (see below), whose sum is σ = 3593507979936. Its totient is φ = 325388367360.

The previous prime is 1231101111299. The next prime is 1231101111301. The reversal of 1231101111300 is 31111011321.

It is an interprime number because it is at equal distance from previous prime (1231101111299) and next prime (1231101111301).

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 1231101111300.

It is not an unprimeable number, because it can be changed into a prime (1231101111301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18123934 + ... + 18191733.

Almost surely, 2^{1231101111300} is an apocalyptic number.

1231101111300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231101111300 is an abundant number, since it is smaller than the sum of its proper divisors (2362406868636).

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

1231101111300 is a wasteful number, since it uses less digits than its factorization.

1231101111300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36315797 (or 36315790 counting only the distinct ones).

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

Adding to 1231101111300 its reverse (31111011321), we get a palindrome (1262212122621).

The spelling of 1231101111300 in words is "one trillion, two hundred thirty-one billion, one hundred one million, one hundred eleven thousand, three hundred".