222020020221991 has 2 divisors, whose sum is σ = 222020020221992. Its totient is φ = 222020020221990.

The previous prime is 222020020221953. The next prime is 222020020222001. The reversal of 222020020221991 is 199122020020222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222020020221991 - 2³⁵ = 221985660483623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222020020221691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111010010110995 + 111010010110996.

It is an arithmetic number, because the mean of its divisors is an integer number (111010010110996).

Almost surely, 2^{222020020221991} is an apocalyptic number.

222020020221991 is a deficient number, since it is larger than the sum of its proper divisors (1).

222020020221991 is an equidigital number, since it uses as much as digits as its factorization.

222020020221991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 222020020221991 in words is "two hundred twenty-two trillion, twenty billion, twenty million, two hundred twenty-one thousand, nine hundred ninety-one".