220001220199991 has 2 divisors, whose sum is σ = 220001220199992. Its totient is φ = 220001220199990.

The previous prime is 220001220199913. The next prime is 220001220200023. The reversal of 220001220199991 is 199991022100022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220001220199991 - 2¹⁸ = 220001219937847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220001220192991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000610099995 + 110000610099996.

It is an arithmetic number, because the mean of its divisors is an integer number (110000610099996).

Almost surely, 2^{220001220199991} is an apocalyptic number.

220001220199991 is a deficient number, since it is larger than the sum of its proper divisors (1).

220001220199991 is an equidigital number, since it uses as much as digits as its factorization.

220001220199991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 220001220199991 in words is "two hundred twenty trillion, one billion, two hundred twenty million, one hundred ninety-nine thousand, nine hundred ninety-one".