1010120521 has 2 divisors, whose sum is σ = 1010120522. Its totient is φ = 1010120520.

The previous prime is 1010120513. The next prime is 1010120561. The reversal of 1010120521 is 1250210101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661775625 + 348344896 = 25725^2 + 18664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010120521 - 2³ = 1010120513 is a prime.

It is a super-2 number, since 2×1010120521² = 2040686933890622882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1010120561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505060260 + 505060261.

It is an arithmetic number, because the mean of its divisors is an integer number (505060261).

Almost surely, 2^1010120521 is an apocalyptic number.

It is an amenable number.

1010120521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010120521 is an equidigital number, since it uses as much as digits as its factorization.

1010120521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 1010120521 is about 31782.3932547566. The cubic root of 1010120521 is about 1003.3621900092.

Adding to 1010120521 its reverse (1250210101), we get a palindrome (2260330622).

The spelling of 1010120521 in words is "one billion, ten million, one hundred twenty thousand, five hundred twenty-one".