121211220201191 has 2 divisors, whose sum is σ = 121211220201192. Its totient is φ = 121211220201190.

The previous prime is 121211220201107. The next prime is 121211220201233. The reversal of 121211220201191 is 191102022112121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121211220201191 - 2¹⁴ = 121211220184807 is a prime.

It is a super-2 number, since 2×121211220201191² (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 121211220201191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121211220201091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605610100595 + 60605610100596.

It is an arithmetic number, because the mean of its divisors is an integer number (60605610100596).

Almost surely, 2^{121211220201191} is an apocalyptic number.

121211220201191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211220201191 is an equidigital number, since it uses as much as digits as its factorization.

121211220201191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 121211220201191 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred twenty million, two hundred one thousand, one hundred ninety-one".