2220124123991 has 2 divisors, whose sum is σ = 2220124123992. Its totient is φ = 2220124123990.

The previous prime is 2220124123969. The next prime is 2220124124003. The reversal of 2220124123991 is 1993214210222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2220124123991 - 2³⁰ = 2219050382167 is a prime.

It is a super-2 number, since 2×2220124123991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220124123391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110062061995 + 1110062061996.

It is an arithmetic number, because the mean of its divisors is an integer number (1110062061996).

Almost surely, 2^{2220124123991} is an apocalyptic number.

2220124123991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220124123991 is an equidigital number, since it uses as much as digits as its factorization.

2220124123991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 2220124123991 in words is "two trillion, two hundred twenty billion, one hundred twenty-four million, one hundred twenty-three thousand, nine hundred ninety-one".