220121010220091 has 2 divisors, whose sum is σ = 220121010220092. Its totient is φ = 220121010220090.

The previous prime is 220121010220063. The next prime is 220121010220117. The reversal of 220121010220091 is 190022010121022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220121010220091 is a prime.

It is not a weakly prime, because it can be changed into another prime (220121010120091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060505110045 + 110060505110046.

It is an arithmetic number, because the mean of its divisors is an integer number (110060505110046).

Almost surely, 2^{220121010220091} is an apocalyptic number.

220121010220091 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121010220091 is an equidigital number, since it uses as much as digits as its factorization.

220121010220091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 220121010220091 in words is "two hundred twenty trillion, one hundred twenty-one billion, ten million, two hundred twenty thousand, ninety-one".