12103219991 has 2 divisors, whose sum is σ = 12103219992. Its totient is φ = 12103219990.

The previous prime is 12103219987. The next prime is 12103220029. The reversal of 12103219991 is 19991230121.

It is an a-pointer prime, because the next prime (12103220029) can be obtained adding 12103219991 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12103219991 - 2² = 12103219987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12103219951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051609995 + 6051609996.

It is an arithmetic number, because the mean of its divisors is an integer number (6051609996).

Almost surely, 2^12103219991 is an apocalyptic number.

12103219991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12103219991 is an equidigital number, since it uses as much as digits as its factorization.

12103219991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 12103219991 in words is "twelve billion, one hundred three million, two hundred nineteen thousand, nine hundred ninety-one".