1002130621 has 2 divisors, whose sum is σ = 1002130622. Its totient is φ = 1002130620.

The previous prime is 1002130601. The next prime is 1002130639. The reversal of 1002130621 is 1260312001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 884408121 + 117722500 = 29739^2 + 10850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002130621 - 2⁵ = 1002130589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002130595 and 1002130604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002130601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501065310 + 501065311.

It is an arithmetic number, because the mean of its divisors is an integer number (501065311).

Almost surely, 2^1002130621 is an apocalyptic number.

It is an amenable number.

1002130621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002130621 is an equidigital number, since it uses as much as digits as its factorization.

1002130621 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 16.

The square root of 1002130621 is about 31656.4467525969. The cubic root of 1002130621 is about 1000.7097032022.

Adding to 1002130621 its reverse (1260312001), we get a palindrome (2262442622).

The spelling of 1002130621 in words is "one billion, two million, one hundred thirty thousand, six hundred twenty-one".