100122121091 has 2 divisors, whose sum is σ = 100122121092. Its totient is φ = 100122121090.

The previous prime is 100122121069. The next prime is 100122121093. The reversal of 100122121091 is 190121221001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100122121091 - 2²⁶ = 100055012227 is a prime.

Together with 100122121093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100122121093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50061060545 + 50061060546.

It is an arithmetic number, because the mean of its divisors is an integer number (50061060546).

Almost surely, 2^100122121091 is an apocalyptic number.

100122121091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100122121091 is an equidigital number, since it uses as much as digits as its factorization.

100122121091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 100122121091 its reverse (190121221001), we get a palindrome (290243342092).

The spelling of 100122121091 in words is "one hundred billion, one hundred twenty-two million, one hundred twenty-one thousand, ninety-one".