12111000021947 has 2 divisors, whose sum is σ = 12111000021948. Its totient is φ = 12111000021946.

The previous prime is 12111000021941. The next prime is 12111000022049. The reversal of 12111000021947 is 74912000011121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12111000021947 - 2⁸ = 12111000021691 is a prime.

It is not a weakly prime, because it can be changed into another prime (12111000021941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055500010973 + 6055500010974.

It is an arithmetic number, because the mean of its divisors is an integer number (6055500010974).

Almost surely, 2^{12111000021947} is an apocalyptic number.

12111000021947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111000021947 is an equidigital number, since it uses as much as digits as its factorization.

12111000021947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The spelling of 12111000021947 in words is "twelve trillion, one hundred eleven billion, twenty-one thousand, nine hundred forty-seven".