1231111303231 has 8 divisors (see below), whose sum is σ = 1296282438000. Its totient is φ = 1165977748800.

The previous prime is 1231111303181. The next prime is 1231111303243. The reversal of 1231111303231 is 1323031111321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231111303231 - 2²³ = 1231102914623 is a prime.

It is a super-2 number, since 2×1231111303231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231111303271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9327820 + ... + 9458881.

It is an arithmetic number, because the mean of its divisors is an integer number (162035304750).

Almost surely, 2^{1231111303231} is an apocalyptic number.

1231111303231 is a deficient number, since it is larger than the sum of its proper divisors (65171134769).

1231111303231 is a wasteful number, since it uses less digits than its factorization.

1231111303231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18790169.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1231111303231 its reverse (1323031111321), we get a palindrome (2554142414552).

The spelling of 1231111303231 in words is "one trillion, two hundred thirty-one billion, one hundred eleven million, three hundred three thousand, two hundred thirty-one".