121212110947 has 2 divisors, whose sum is σ = 121212110948. Its totient is φ = 121212110946.

The previous prime is 121212110923. The next prime is 121212110977. The reversal of 121212110947 is 749011212121.

It is a weak prime.

It is an emirp because it is prime and its reverse (749011212121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212110947 is a prime.

It is not a weakly prime, because it can be changed into another prime (121212110977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606055473 + 60606055474.

It is an arithmetic number, because the mean of its divisors is an integer number (60606055474).

Almost surely, 2^121212110947 is an apocalyptic number.

121212110947 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212110947 is an equidigital number, since it uses as much as digits as its factorization.

121212110947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 121212110947 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, nine hundred forty-seven".