1231450511005 has 32 divisors (see below), whose sum is σ = 1740331998720. Its totient is φ = 824686548480.

The previous prime is 1231450510987. The next prime is 1231450511009. The reversal of 1231450511005 is 5001150541321.

It is not a de Polignac number, because 1231450511005 - 2⁵ = 1231450510973 is a prime.

It is a super-2 number, since 2×1231450511005² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231450511009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1813077 + ... + 2397946.

It is an arithmetic number, because the mean of its divisors is an integer number (54385374960).

Almost surely, 2^{1231450511005} is an apocalyptic number.

It is an amenable number.

1231450511005 is a deficient number, since it is larger than the sum of its proper divisors (508881487715).

1231450511005 is a wasteful number, since it uses less digits than its factorization.

1231450511005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211461.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 1231450511005 in words is "one trillion, two hundred thirty-one billion, four hundred fifty million, five hundred eleven thousand, five".