102100121211091 has 2 divisors, whose sum is σ = 102100121211092. Its totient is φ = 102100121211090.

The previous prime is 102100121211047. The next prime is 102100121211203. The reversal of 102100121211091 is 190112121001201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102100121211091 - 2⁷ = 102100121210963 is a prime.

It is not a weakly prime, because it can be changed into another prime (102100121211001) 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, 51050060605545 + 51050060605546.

It is an arithmetic number, because the mean of its divisors is an integer number (51050060605546).

Almost surely, 2^{102100121211091} is an apocalyptic number.

102100121211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

102100121211091 is an equidigital number, since it uses as much as digits as its factorization.

102100121211091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

Adding to 102100121211091 its reverse (190112121001201), we get a palindrome (292212242212292).

The spelling of 102100121211091 in words is "one hundred two trillion, one hundred billion, one hundred twenty-one million, two hundred eleven thousand, ninety-one".