1110020981 has 2 divisors, whose sum is σ = 1110020982. Its totient is φ = 1110020980.

The previous prime is 1110020969. The next prime is 1110021019. The reversal of 1110020981 is 1890200111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783496081 + 326524900 = 27991^2 + 18070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110020981 - 2²² = 1105826677 is a prime.

It is a super-2 number, since 2×1110020981² = 2464293156520404722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110020911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555010490 + 555010491.

It is an arithmetic number, because the mean of its divisors is an integer number (555010491).

Almost surely, 2^1110020981 is an apocalyptic number.

It is an amenable number.

1110020981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110020981 is an equidigital number, since it uses as much as digits as its factorization.

1110020981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 1110020981 is about 33316.9773689031. The cubic root of 1110020981 is about 1035.4053290416.

The spelling of 1110020981 in words is "one billion, one hundred ten million, twenty thousand, nine hundred eighty-one".