102212120212621 has 2 divisors, whose sum is σ = 102212120212622. Its totient is φ = 102212120212620.

The previous prime is 102212120212603. The next prime is 102212120212627. The reversal of 102212120212621 is 126212021212201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85287626116900 + 16924494095721 = 9235130^2 + 4113939^2 .

It is a cyclic number.

It is not a de Polignac number, because 102212120212621 - 2⁷ = 102212120212493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102212120212627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51106060106310 + 51106060106311.

It is an arithmetic number, because the mean of its divisors is an integer number (51106060106311).

Almost surely, 2^{102212120212621} is an apocalyptic number.

It is an amenable number.

102212120212621 is a deficient number, since it is larger than the sum of its proper divisors (1).

102212120212621 is an equidigital number, since it uses as much as digits as its factorization.

102212120212621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 102212120212621 its reverse (126212021212201), we get a palindrome (228424141424822).

The spelling of 102212120212621 in words is "one hundred two trillion, two hundred twelve billion, one hundred twenty million, two hundred twelve thousand, six hundred twenty-one".