1231201013 has 32 divisors (see below), whose sum is σ = 1533385728. Its totient is φ = 964454400.

The previous prime is 1231200961. The next prime is 1231201019. The reversal of 1231201013 is 3101021321.

It is not a de Polignac number, because 1231201013 - 2¹⁸ = 1230938869 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231201019) 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, 1351028 + ... + 1351938.

It is an arithmetic number, because the mean of its divisors is an integer number (47918304).

Almost surely, 2^1231201013 is an apocalyptic number.

It is an amenable number.

1231201013 is a deficient number, since it is larger than the sum of its proper divisors (302184715).

1231201013 is a wasteful number, since it uses less digits than its factorization.

1231201013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1231201013 is about 35088.4740762547. The cubic root of 1231201013 is about 1071.7898865718.

Adding to 1231201013 its reverse (3101021321), we get a palindrome (4332222334).

The spelling of 1231201013 in words is "one billion, two hundred thirty-one million, two hundred one thousand, thirteen".