1231532440105 has 16 divisors (see below), whose sum is σ = 1612393159104. Its totient is φ = 895545935680.

The previous prime is 1231532440081. The next prime is 1231532440133. The reversal of 1231532440105 is 5010442351321.

It is not a de Polignac number, because 1231532440105 - 2²⁷ = 1231398222377 is a prime.

It is a super-2 number, since 2×1231532440105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 988087 + ... + 1854556.

It is an arithmetic number, because the mean of its divisors is an integer number (100774572444).

Almost surely, 2^{1231532440105} is an apocalyptic number.

It is an amenable number.

1231532440105 is a deficient number, since it is larger than the sum of its proper divisors (380860718999).

1231532440105 is a wasteful number, since it uses less digits than its factorization.

1231532440105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850536.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1231532440105 its reverse (5010442351321), we get a palindrome (6241974791426).

The spelling of 1231532440105 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-two million, four hundred forty thousand, one hundred five".