1121020021831 has 2 divisors, whose sum is σ = 1121020021832. Its totient is φ = 1121020021830.

The previous prime is 1121020021753. The next prime is 1121020021987. The reversal of 1121020021831 is 1381200201211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121020021831 - 2³³ = 1112430087239 is a prime.

It is a super-2 number, since 2×1121020021831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121020021631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560510010915 + 560510010916.

It is an arithmetic number, because the mean of its divisors is an integer number (560510010916).

Almost surely, 2^{1121020021831} is an apocalyptic number.

1121020021831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121020021831 is an equidigital number, since it uses as much as digits as its factorization.

1121020021831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 22.

The spelling of 1121020021831 in words is "one trillion, one hundred twenty-one billion, twenty million, twenty-one thousand, eight hundred thirty-one".