1121209995637 has 2 divisors, whose sum is σ = 1121209995638. Its totient is φ = 1121209995636.

The previous prime is 1121209995547. The next prime is 1121209995641. The reversal of 1121209995637 is 7365999021211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960153055876 + 161056939761 = 979874^2 + 401319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121209995637 - 2¹⁵ = 1121209962869 is a prime.

It is a super-2 number, since 2×1121209995637² (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 (1121209995137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560604997818 + 560604997819.

It is an arithmetic number, because the mean of its divisors is an integer number (560604997819).

Almost surely, 2^{1121209995637} is an apocalyptic number.

It is an amenable number.

1121209995637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121209995637 is an equidigital number, since it uses as much as digits as its factorization.

1121209995637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 1121209995637 in words is "one trillion, one hundred twenty-one billion, two hundred nine million, nine hundred ninety-five thousand, six hundred thirty-seven".