1121020113231 has 16 divisors (see below), whose sum is σ = 1661197736800. Its totient is φ = 747154502784.

The previous prime is 1121020113179. The next prime is 1121020113233. The reversal of 1121020113231 is 1323110201211.

1121020113231 is a `hidden beast` number, since 11 + 210 + 201 + 13 + 231 = 666.

It is not a de Polignac number, because 1121020113231 - 2¹⁵ = 1121020080463 is a prime.

It is a super-2 number, since 2×1121020113231² (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 (1121020113233) 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, 5233036 + ... + 5443041.

It is an arithmetic number, because the mean of its divisors is an integer number (103824858550).

Almost surely, 2^{1121020113231} is an apocalyptic number.

1121020113231 is a deficient number, since it is larger than the sum of its proper divisors (540177623569).

1121020113231 is a wasteful number, since it uses less digits than its factorization.

1121020113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10679975 (or 10679969 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1121020113231 its reverse (1323110201211), we get a palindrome (2444130314442).

The spelling of 1121020113231 in words is "one trillion, one hundred twenty-one billion, twenty million, one hundred thirteen thousand, two hundred thirty-one".