1231023311100 has 216 divisors, whose sum is σ = 4323121250448. Its totient is φ = 290364134400.

The previous prime is 1231023311081. The next prime is 1231023311143. The reversal of 1231023311100 is 11133201321.

1231023311100 is a `hidden beast` number, since 1 + 231 + 0 + 2 + 331 + 1 + 100 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1314049 + ... + 2046648.

Almost surely, 2^{1231023311100} is an apocalyptic number.

1231023311100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231023311100 is an abundant number, since it is smaller than the sum of its proper divisors (3092097939348).

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

1231023311100 is a wasteful number, since it uses less digits than its factorization.

1231023311100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360765 (or 3360755 counting only the distinct ones).

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

Adding to 1231023311100 its reverse (11133201321), we get a palindrome (1242156512421).

The spelling of 1231023311100 in words is "one trillion, two hundred thirty-one billion, twenty-three million, three hundred eleven thousand, one hundred".