1012202621 has 2 divisors, whose sum is σ = 1012202622. Its totient is φ = 1012202620.

The previous prime is 1012202617. The next prime is 1012202623. The reversal of 1012202621 is 1262022101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949317721 + 62884900 = 30811^2 + 7930^2 .

It is an emirp because it is prime and its reverse (1262022101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1012202621 - 2² = 1012202617 is a prime.

Together with 1012202623, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012202621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012202623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506101310 + 506101311.

It is an arithmetic number, because the mean of its divisors is an integer number (506101311).

Almost surely, 2^1012202621 is an apocalyptic number.

It is an amenable number.

1012202621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012202621 is an equidigital number, since it uses as much as digits as its factorization.

1012202621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1012202621 is about 31815.1319500643. The cubic root of 1012202621 is about 1004.0511067063.

Adding to 1012202621 its reverse (1262022101), we get a palindrome (2274224722).

The spelling of 1012202621 in words is "one billion, twelve million, two hundred two thousand, six hundred twenty-one".