1011002081 has 2 divisors, whose sum is σ = 1011002082. Its totient is φ = 1011002080.

The previous prime is 1011002071. The next prime is 1011002117. The reversal of 1011002081 is 1802001101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699126481 + 311875600 = 26441^2 + 17660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011002081 - 2¹⁴ = 1010985697 is a prime.

It is a super-2 number, since 2×1011002081² = 2044250415572661122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011002051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505501040 + 505501041.

It is an arithmetic number, because the mean of its divisors is an integer number (505501041).

Almost surely, 2^1011002081 is an apocalyptic number.

It is an amenable number.

1011002081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011002081 is an equidigital number, since it uses as much as digits as its factorization.

1011002081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1011002081 is about 31796.2589151617. The cubic root of 1011002081 is about 1003.6539924105.

Adding to 1011002081 its reverse (1802001101), we get a palindrome (2813003182).

The spelling of 1011002081 in words is "one billion, eleven million, two thousand, eighty-one".