1231232102111 has 16 divisors (see below), whose sum is σ = 1376218771200. Its totient is φ = 1091766609600.

The previous prime is 1231232102083. The next prime is 1231232102129. The reversal of 1231232102111 is 1112012321321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231232102111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231232102161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1818500 + ... + 2401958.

It is an arithmetic number, because the mean of its divisors is an integer number (86013673200).

Almost surely, 2^{1231232102111} is an apocalyptic number.

1231232102111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231232102111 is a deficient number, since it is larger than the sum of its proper divisors (144986669089).

1231232102111 is a wasteful number, since it uses less digits than its factorization.

1231232102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588190.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1231232102111 its reverse (1112012321321), we get a palindrome (2343244423432).

The spelling of 1231232102111 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-two million, one hundred two thousand, one hundred eleven".