1231313201100 has 216 divisors, whose sum is σ = 4227426927360. Its totient is φ = 298378967040.

The previous prime is 1231313201099. The next prime is 1231313201101. The reversal of 1231313201100 is 11023131321.

1231313201100 is a `hidden beast` number, since 1 + 231 + 3 + 1 + 320 + 110 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1231313201099) and next prime (1231313201101).

It is a super-2 number, since 2×1231313201100² (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 not an unprimeable number, because it can be changed into a prime (1231313201101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 943852 + ... + 1831251.

It is an arithmetic number, because the mean of its divisors is an integer number (19571420960).

Almost surely, 2^{1231313201100} is an apocalyptic number.

1231313201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231313201100 is an abundant number, since it is smaller than the sum of its proper divisors (2996113726260).

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

1231313201100 is a wasteful number, since it uses less digits than its factorization.

1231313201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775169 (or 2775159 counting only the distinct ones).

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

Adding to 1231313201100 its reverse (11023131321), we get a palindrome (1242336332421).

The spelling of 1231313201100 in words is "one trillion, two hundred thirty-one billion, three hundred thirteen million, two hundred one thousand, one hundred".