102000212121191 has 2 divisors, whose sum is σ = 102000212121192. Its totient is φ = 102000212121190.

The previous prime is 102000212121187. The next prime is 102000212121229. The reversal of 102000212121191 is 191121212000201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102000212121191 - 2² = 102000212121187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102000212121491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000106060595 + 51000106060596.

It is an arithmetic number, because the mean of its divisors is an integer number (51000106060596).

Almost surely, 2^{102000212121191} is an apocalyptic number.

102000212121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

102000212121191 is an equidigital number, since it uses as much as digits as its factorization.

102000212121191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 102000212121191 its reverse (191121212000201), we get a palindrome (293121424121392).

The spelling of 102000212121191 in words is "one hundred two trillion, two hundred twelve million, one hundred twenty-one thousand, one hundred ninety-one".