2220212211991 has 2 divisors, whose sum is σ = 2220212211992. Its totient is φ = 2220212211990.

The previous prime is 2220212211989. The next prime is 2220212212021. The reversal of 2220212211991 is 1991122120222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2220212211991 - 2¹ = 2220212211989 is a prime.

Together with 2220212211989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220212214991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110106105995 + 1110106105996.

It is an arithmetic number, because the mean of its divisors is an integer number (1110106105996).

Almost surely, 2^{2220212211991} is an apocalyptic number.

2220212211991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220212211991 is an equidigital number, since it uses as much as digits as its factorization.

2220212211991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 2220212211991 in words is "two trillion, two hundred twenty billion, two hundred twelve million, two hundred eleven thousand, nine hundred ninety-one".