1231100100423 has 24 divisors (see below), whose sum is σ = 1808609562240. Its totient is φ = 806727217680.

The previous prime is 1231100100409. The next prime is 1231100100427. The reversal of 1231100100423 is 3240010011321.

1231100100423 is a `hidden beast` number, since 1 + 231 + 1 + 0 + 0 + 10 + 0 + 423 = 666.

It is not a de Polignac number, because 1231100100423 - 2²⁵ = 1231066545991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231100100396 and 1231100100405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231100100427) 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, 4503390 + ... + 4768932.

It is an arithmetic number, because the mean of its divisors is an integer number (75358731760).

Almost surely, 2^{1231100100423} is an apocalyptic number.

1231100100423 is a deficient number, since it is larger than the sum of its proper divisors (577509461817).

1231100100423 is a wasteful number, since it uses less digits than its factorization.

1231100100423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274339 (or 274336 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1231100100423 its reverse (3240010011321), we get a palindrome (4471110111744).

The spelling of 1231100100423 in words is "one trillion, two hundred thirty-one billion, one hundred million, one hundred thousand, four hundred twenty-three".