211220120191 has 2 divisors, whose sum is σ = 211220120192. Its totient is φ = 211220120190.

The previous prime is 211220120179. The next prime is 211220120203. The reversal of 211220120191 is 191021022112.

It is a balanced prime because it is at equal distance from previous prime (211220120179) and next prime (211220120203).

It is a cyclic number.

It is not a de Polignac number, because 211220120191 - 2¹¹ = 211220118143 is a prime.

It is a super-2 number, since 2×211220120191² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211220120141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610060095 + 105610060096.

It is an arithmetic number, because the mean of its divisors is an integer number (105610060096).

Almost surely, 2^211220120191 is an apocalyptic number.

211220120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220120191 is an equidigital number, since it uses as much as digits as its factorization.

211220120191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 211220120191 in words is "two hundred eleven billion, two hundred twenty million, one hundred twenty thousand, one hundred ninety-one".