102196621 has 2 divisors, whose sum is σ = 102196622. Its totient is φ = 102196620.

The previous prime is 102196603. The next prime is 102196631. The reversal of 102196621 is 126691201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101727396 + 469225 = 10086^2 + 685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102196621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102196621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102196631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51098310 + 51098311.

It is an arithmetic number, because the mean of its divisors is an integer number (51098311).

Almost surely, 2^102196621 is an apocalyptic number.

It is an amenable number.

102196621 is a deficient number, since it is larger than the sum of its proper divisors (1).

102196621 is an equidigital number, since it uses as much as digits as its factorization.

102196621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 102196621 is about 10109.2344418358. The cubic root of 102196621 is about 467.5329016851.

The spelling of 102196621 in words is "one hundred two million, one hundred ninety-six thousand, six hundred twenty-one".