210101111121091 has 2 divisors, whose sum is σ = 210101111121092. Its totient is φ = 210101111121090.

The previous prime is 210101111121053. The next prime is 210101111121113. The reversal of 210101111121091 is 190121111101012.

It is an a-pointer prime, because the next prime (210101111121113) can be obtained adding 210101111121091 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210101111121091 - 2⁴³ = 201305018098883 is a prime.

It is not a weakly prime, because it can be changed into another prime (210101111121491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050555560545 + 105050555560546.

It is an arithmetic number, because the mean of its divisors is an integer number (105050555560546).

Almost surely, 2^{210101111121091} is an apocalyptic number.

210101111121091 is a deficient number, since it is larger than the sum of its proper divisors (1).

210101111121091 is an equidigital number, since it uses as much as digits as its factorization.

210101111121091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 22.

The spelling of 210101111121091 in words is "two hundred ten trillion, one hundred one billion, one hundred eleven million, one hundred twenty-one thousand, ninety-one".