1013012921 has 2 divisors, whose sum is σ = 1013012922. Its totient is φ = 1013012920.

The previous prime is 1013012879. The next prime is 1013012927. The reversal of 1013012921 is 1292103101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 510760000 + 502252921 = 22600^2 + 22411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013012921 - 2⁶ = 1013012857 is a prime.

It is a super-2 number, since 2×1013012921² = 2052390356225904482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1013012893 and 1013012902.

It is not a weakly prime, because it can be changed into another prime (1013012927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506506460 + 506506461.

It is an arithmetic number, because the mean of its divisors is an integer number (506506461).

Almost surely, 2^1013012921 is an apocalyptic number.

It is an amenable number.

1013012921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013012921 is an equidigital number, since it uses as much as digits as its factorization.

1013012921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1013012921 is about 31827.8639088457. The cubic root of 1013012921 is about 1004.3189600629.

The spelling of 1013012921 in words is "one billion, thirteen million, twelve thousand, nine hundred twenty-one".