1301120621 has 2 divisors, whose sum is σ = 1301120622. Its totient is φ = 1301120620.

The previous prime is 1301120549. The next prime is 1301120629. The reversal of 1301120621 is 1260211031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 702780100 + 598340521 = 26510^2 + 24461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1301120621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1301120621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301120629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650560310 + 650560311.

It is an arithmetic number, because the mean of its divisors is an integer number (650560311).

Almost surely, 2^1301120621 is an apocalyptic number.

It is an amenable number.

1301120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301120621 is an equidigital number, since it uses as much as digits as its factorization.

1301120621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1301120621 is about 36071.0496243178. The cubic root of 1301120621 is about 1091.7063924268.

Adding to 1301120621 its reverse (1260211031), we get a palindrome (2561331652).

The spelling of 1301120621 in words is "one billion, three hundred one million, one hundred twenty thousand, six hundred twenty-one".