3123203223991 has 2 divisors, whose sum is σ = 3123203223992. Its totient is φ = 3123203223990.

The previous prime is 3123203223989. The next prime is 3123203224051. The reversal of 3123203223991 is 1993223023213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3123203223991 - 2¹ = 3123203223989 is a prime.

Together with 3123203223989, 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 (3123203223971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561601611995 + 1561601611996.

It is an arithmetic number, because the mean of its divisors is an integer number (1561601611996).

Almost surely, 2^{3123203223991} is an apocalyptic number.

3123203223991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123203223991 is an equidigital number, since it uses as much as digits as its factorization.

3123203223991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 40.

The spelling of 3123203223991 in words is "three trillion, one hundred twenty-three billion, two hundred three million, two hundred twenty-three thousand, nine hundred ninety-one".