1121021220231 has 40 divisors (see below), whose sum is σ = 1827001482768. Its totient is φ = 679350240000.

The previous prime is 1121021220227. The next prime is 1121021220281. The reversal of 1121021220231 is 1320221201211.

1121021220231 is a `hidden beast` number, since 1 + 1 + 210 + 2 + 1 + 220 + 231 = 666.

It is not a de Polignac number, because 1121021220231 - 2² = 1121021220227 is a prime.

It is a super-2 number, since 2×1121021220231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121021220281) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12286881 + ... + 12377781.

Almost surely, 2^{1121021220231} is an apocalyptic number.

1121021220231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121021220231 is a deficient number, since it is larger than the sum of its proper divisors (705980262537).

1121021220231 is a wasteful number, since it uses less digits than its factorization.

1121021220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104765 (or 104756 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1121021220231 its reverse (1320221201211), we get a palindrome (2441242421442).

The spelling of 1121021220231 in words is "one trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty thousand, two hundred thirty-one".