1102021099981 has 2 divisors, whose sum is σ = 1102021099982. Its totient is φ = 1102021099980.

The previous prime is 1102021099967. The next prime is 1102021100017. The reversal of 1102021099981 is 1899901202011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 560117528100 + 541903571881 = 748410^2 + 736141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102021099981 - 2¹⁹ = 1102020575693 is a prime.

It is a super-2 number, since 2×1102021099981² (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 (1102021099951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551010549990 + 551010549991.

It is an arithmetic number, because the mean of its divisors is an integer number (551010549991).

Almost surely, 2^{1102021099981} is an apocalyptic number.

It is an amenable number.

1102021099981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1102021099981 is an equidigital number, since it uses as much as digits as its factorization.

1102021099981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 1102021099981 in words is "one trillion, one hundred two billion, twenty-one million, ninety-nine thousand, nine hundred eighty-one".