20121103112947 has 2 divisors, whose sum is σ = 20121103112948. Its totient is φ = 20121103112946.

The previous prime is 20121103112927. The next prime is 20121103113037. The reversal of 20121103112947 is 74921130112102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121103112947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121103112927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060551556473 + 10060551556474.

It is an arithmetic number, because the mean of its divisors is an integer number (10060551556474).

Almost surely, 2^{20121103112947} is an apocalyptic number.

20121103112947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121103112947 is an equidigital number, since it uses as much as digits as its factorization.

20121103112947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 20121103112947 in words is "twenty trillion, one hundred twenty-one billion, one hundred three million, one hundred twelve thousand, nine hundred forty-seven".