1011313021 has 2 divisors, whose sum is σ = 1011313022. Its totient is φ = 1011313020.

The previous prime is 1011313003. The next prime is 1011313067. The reversal of 1011313021 is 1203131101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999444996 + 11868025 = 31614^2 + 3445^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011313021 - 2⁵ = 1011312989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011312992 and 1011313010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011313081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505656510 + 505656511.

It is an arithmetic number, because the mean of its divisors is an integer number (505656511).

Almost surely, 2^1011313021 is an apocalyptic number.

It is an amenable number.

1011313021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011313021 is an equidigital number, since it uses as much as digits as its factorization.

1011313021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1011313021 is about 31801.1481082052. The cubic root of 1011313021 is about 1003.7568752136.

Adding to 1011313021 its reverse (1203131101), we get a palindrome (2214444122).

The spelling of 1011313021 in words is "one billion, eleven million, three hundred thirteen thousand, twenty-one".