102100112721493 has 2 divisors, whose sum is σ = 102100112721494. Its totient is φ = 102100112721492.

The previous prime is 102100112721403. The next prime is 102100112721553. The reversal of 102100112721493 is 394127211001201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80565380575684 + 21534732145809 = 8975822^2 + 4640553^2 .

It is an emirp because it is prime and its reverse (394127211001201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102100112721493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102100112721403) 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, 51050056360746 + 51050056360747.

It is an arithmetic number, because the mean of its divisors is an integer number (51050056360747).

Almost surely, 2^{102100112721493} is an apocalyptic number.

It is an amenable number.

102100112721493 is a deficient number, since it is larger than the sum of its proper divisors (1).

102100112721493 is an equidigital number, since it uses as much as digits as its factorization.

102100112721493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

Adding to 102100112721493 its reverse (394127211001201), we get a palindrome (496227323722694).

The spelling of 102100112721493 in words is "one hundred two trillion, one hundred billion, one hundred twelve million, seven hundred twenty-one thousand, four hundred ninety-three".