1231432100501 has 2 divisors, whose sum is σ = 1231432100502. Its totient is φ = 1231432100500.

The previous prime is 1231432100489. The next prime is 1231432100551. The reversal of 1231432100501 is 1050012341321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 896949161476 + 334482939025 = 947074^2 + 578345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231432100501 - 2¹⁴ = 1231432084117 is a prime.

It is a super-3 number, since 3×1231432100501³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231432100551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615716050250 + 615716050251.

It is an arithmetic number, because the mean of its divisors is an integer number (615716050251).

Almost surely, 2^{1231432100501} is an apocalyptic number.

It is an amenable number.

1231432100501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231432100501 is an equidigital number, since it uses as much as digits as its factorization.

1231432100501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1231432100501 its reverse (1050012341321), we get a palindrome (2281444441822).

The spelling of 1231432100501 in words is "one trillion, two hundred thirty-one billion, four hundred thirty-two million, one hundred thousand, five hundred one".