1012312621 has 2 divisors, whose sum is σ = 1012312622. Its totient is φ = 1012312620.

The previous prime is 1012312601. The next prime is 1012312643. The reversal of 1012312621 is 1262132101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 703045225 + 309267396 = 26515^2 + 17586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012312621 - 2⁵ = 1012312589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012312601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506156310 + 506156311.

It is an arithmetic number, because the mean of its divisors is an integer number (506156311).

Almost surely, 2^1012312621 is an apocalyptic number.

It is an amenable number.

1012312621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012312621 is an equidigital number, since it uses as much as digits as its factorization.

1012312621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1012312621 is about 31816.8606402329. The cubic root of 1012312621 is about 1004.0874767699.

Adding to 1012312621 its reverse (1262132101), we get a palindrome (2274444722).

The spelling of 1012312621 in words is "one billion, twelve million, three hundred twelve thousand, six hundred twenty-one".