2101211201191 has 2 divisors, whose sum is σ = 2101211201192. Its totient is φ = 2101211201190.

The previous prime is 2101211201179. The next prime is 2101211201263. The reversal of 2101211201191 is 1911021121012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101211201191 - 2²¹ = 2101209104039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101211201171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050605600595 + 1050605600596.

It is an arithmetic number, because the mean of its divisors is an integer number (1050605600596).

Almost surely, 2^{2101211201191} is an apocalyptic number.

2101211201191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101211201191 is an equidigital number, since it uses as much as digits as its factorization.

2101211201191 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 22.

The spelling of 2101211201191 in words is "two trillion, one hundred one billion, two hundred eleven million, two hundred one thousand, one hundred ninety-one".