1081022981 has 2 divisors, whose sum is σ = 1081022982. Its totient is φ = 1081022980.

The previous prime is 1081022951. The next prime is 1081023001. The reversal of 1081022981 is 1892201801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 961558081 + 119464900 = 31009^2 + 10930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081022981 is a prime.

It is a super-2 number, since 2×1081022981² = 2337221370900252722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081022951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540511490 + 540511491.

It is an arithmetic number, because the mean of its divisors is an integer number (540511491).

Almost surely, 2^1081022981 is an apocalyptic number.

It is an amenable number.

1081022981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081022981 is an equidigital number, since it uses as much as digits as its factorization.

1081022981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 1081022981 is about 32878.9139267099. The cubic root of 1081022981 is about 1026.3094052075.

The spelling of 1081022981 in words is "one billion, eighty-one million, twenty-two thousand, nine hundred eighty-one".