1123100131961 has 2 divisors, whose sum is σ = 1123100131962. Its totient is φ = 1123100131960.

The previous prime is 1123100131957. The next prime is 1123100131969. The reversal of 1123100131961 is 1691310013211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1116614890000 + 6485241961 = 1056700^2 + 80531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123100131961 - 2² = 1123100131957 is a prime.

It is a super-2 number, since 2×1123100131961² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1123100131969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561550065980 + 561550065981.

It is an arithmetic number, because the mean of its divisors is an integer number (561550065981).

Almost surely, 2^{1123100131961} is an apocalyptic number.

It is an amenable number.

1123100131961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123100131961 is an equidigital number, since it uses as much as digits as its factorization.

1123100131961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 1123100131961 in words is "one trillion, one hundred twenty-three billion, one hundred million, one hundred thirty-one thousand, nine hundred sixty-one".