1011240521 has 2 divisors, whose sum is σ = 1011240522. Its totient is φ = 1011240520.

The previous prime is 1011240511. The next prime is 1011240551. The reversal of 1011240521 is 1250421101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001406025 + 9834496 = 31645^2 + 3136^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011240521 - 2¹⁸ = 1010978377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011240521.

It is not a weakly prime, because it can be changed into another prime (1011240511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505620260 + 505620261.

It is an arithmetic number, because the mean of its divisors is an integer number (505620261).

Almost surely, 2^1011240521 is an apocalyptic number.

It is an amenable number.

1011240521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011240521 is an equidigital number, since it uses as much as digits as its factorization.

1011240521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1011240521 is about 31800.0081918228. The cubic root of 1011240521 is about 1003.7328885379.

Adding to 1011240521 its reverse (1250421101), we get a palindrome (2261661622).

The spelling of 1011240521 in words is "one billion, eleven million, two hundred forty thousand, five hundred twenty-one".