102113621 has 2 divisors, whose sum is σ = 102113622. Its totient is φ = 102113620.

The previous prime is 102113603. The next prime is 102113633. The reversal of 102113621 is 126311201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93876721 + 8236900 = 9689^2 + 2870^2 .

It is a cyclic number.

It is not a de Polignac number, because 102113621 - 2²⁶ = 35004757 is a prime.

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 102113621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102113681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51056810 + 51056811.

It is an arithmetic number, because the mean of its divisors is an integer number (51056811).

Almost surely, 2^102113621 is an apocalyptic number.

It is an amenable number.

102113621 is a deficient number, since it is larger than the sum of its proper divisors (1).

102113621 is an equidigital number, since it uses as much as digits as its factorization.

102113621 is an odious number, because the sum of its binary digits is odd.

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

The square root of 102113621 is about 10105.1284504453. The cubic root of 102113621 is about 467.4062969091.

Adding to 102113621 its reverse (126311201), we get a palindrome (228424822).

The spelling of 102113621 in words is "one hundred two million, one hundred thirteen thousand, six hundred twenty-one".