102021212109997 has 2 divisors, whose sum is σ = 102021212109998. Its totient is φ = 102021212109996.

The previous prime is 102021212109923. The next prime is 102021212110061. The reversal of 102021212109997 is 799901212120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99659869714441 + 2361342395556 = 9982979^2 + 1536666^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021212109997 - 2³⁹ = 101471456296109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021212109197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010606054998 + 51010606054999.

It is an arithmetic number, because the mean of its divisors is an integer number (51010606054999).

Almost surely, 2^{102021212109997} is an apocalyptic number.

It is an amenable number.

102021212109997 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021212109997 is an equidigital number, since it uses as much as digits as its factorization.

102021212109997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 46.

The spelling of 102021212109997 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, one hundred nine thousand, nine hundred ninety-seven".