220121122002191 has 2 divisors, whose sum is σ = 220121122002192. Its totient is φ = 220121122002190.

The previous prime is 220121122002181. The next prime is 220121122002239. The reversal of 220121122002191 is 191200221121022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220121122002191 - 2⁴⁶ = 149752377824527 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220121122002191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220121122002121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060561001095 + 110060561001096.

It is an arithmetic number, because the mean of its divisors is an integer number (110060561001096).

Almost surely, 2^{220121122002191} is an apocalyptic number.

220121122002191 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121122002191 is an equidigital number, since it uses as much as digits as its factorization.

220121122002191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 220121122002191 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two thousand, one hundred ninety-one".