1121100320981 has 2 divisors, whose sum is σ = 1121100320982. Its totient is φ = 1121100320980.

The previous prime is 1121100320959. The next prime is 1121100321001. The reversal of 1121100320981 is 1890230011211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 980050500625 + 141049820356 = 989975^2 + 375566^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121100320981 - 2¹⁰ = 1121100319957 is a prime.

It is a super-2 number, since 2×1121100320981² (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 (1121100320281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560550160490 + 560550160491.

It is an arithmetic number, because the mean of its divisors is an integer number (560550160491).

Almost surely, 2^{1121100320981} is an apocalyptic number.

It is an amenable number.

1121100320981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121100320981 is an equidigital number, since it uses as much as digits as its factorization.

1121100320981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 1121100320981 in words is "one trillion, one hundred twenty-one billion, one hundred million, three hundred twenty thousand, nine hundred eighty-one".