211012112121191 has 2 divisors, whose sum is σ = 211012112121192. Its totient is φ = 211012112121190.

The previous prime is 211012112121169. The next prime is 211012112121197. The reversal of 211012112121191 is 191121211210112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211012112121191 - 2¹⁸ = 211012111859047 is a prime.

It is a super-2 number, since 2×211012112121191² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211012112121191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211012112121197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506056060595 + 105506056060596.

It is an arithmetic number, because the mean of its divisors is an integer number (105506056060596).

Almost surely, 2^{211012112121191} is an apocalyptic number.

211012112121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

211012112121191 is an equidigital number, since it uses as much as digits as its factorization.

211012112121191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 26.

The spelling of 211012112121191 in words is "two hundred eleven trillion, twelve billion, one hundred twelve million, one hundred twenty-one thousand, one hundred ninety-one".