1121010161231 has 4 divisors (see below), whose sum is σ = 1123350475200. Its totient is φ = 1118669847264.

The previous prime is 1121010161197. The next prime is 1121010161233. The reversal of 1121010161231 is 1321610101211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121010161231 is a prime.

It is a super-2 number, since 2×1121010161231² (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 (1121010161233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170156266 + ... + 1170157223.

It is an arithmetic number, because the mean of its divisors is an integer number (280837618800).

Almost surely, 2^{1121010161231} is an apocalyptic number.

1121010161231 is a deficient number, since it is larger than the sum of its proper divisors (2340313969).

1121010161231 is an equidigital number, since it uses as much as digits as its factorization.

1121010161231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340313968.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 1121010161231 its reverse (1321610101211), we get a palindrome (2442620262442).

The spelling of 1121010161231 in words is "one trillion, one hundred twenty-one billion, ten million, one hundred sixty-one thousand, two hundred thirty-one".