1012012621 has 2 divisors, whose sum is σ = 1012012622. Its totient is φ = 1012012620.

The previous prime is 1012012613. The next prime is 1012012643. The reversal of 1012012621 is 1262102101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011939721 + 72900 = 31811^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012012621 - 2³ = 1012012613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012012595 and 1012012604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012012921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506006310 + 506006311.

It is an arithmetic number, because the mean of its divisors is an integer number (506006311).

Almost surely, 2^1012012621 is an apocalyptic number.

It is an amenable number.

1012012621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012012621 is an equidigital number, since it uses as much as digits as its factorization.

1012012621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1012012621 is about 31812.1458094232. The cubic root of 1012012621 is about 1003.9882794804.

Adding to 1012012621 its reverse (1262102101), we get a palindrome (2274114722).

The spelling of 1012012621 in words is "one billion, twelve million, twelve thousand, six hundred twenty-one".