1231201013331 has 32 divisors (see below), whose sum is σ = 1694144819200. Its totient is φ = 794747479680.

The previous prime is 1231201013303. The next prime is 1231201013359. The reversal of 1231201013331 is 1333101021321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1231201013303) and next prime (1231201013359).

It is not a de Polignac number, because 1231201013331 - 2¹⁵ = 1231200980563 is a prime.

It is a super-2 number, since 2×1231201013331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231201013298 and 1231201013307.

It is not an unprimeable number, because it can be changed into a prime (1231201013531) 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, 58732830 + ... + 58753788.

It is an arithmetic number, because the mean of its divisors is an integer number (52942025600).

Almost surely, 2^{1231201013331} is an apocalyptic number.

1231201013331 is a deficient number, since it is larger than the sum of its proper divisors (462943805869).

1231201013331 is a wasteful number, since it uses less digits than its factorization.

1231201013331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23539.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1231201013331 its reverse (1333101021321), we get a palindrome (2564302034652).

The spelling of 1231201013331 in words is "one trillion, two hundred thirty-one billion, two hundred one million, thirteen thousand, three hundred thirty-one".