121113049987 has 2 divisors, whose sum is σ = 121113049988. Its totient is φ = 121113049986.

The previous prime is 121113049973. The next prime is 121113049999. The reversal of 121113049987 is 789940311121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121113049987 is a prime.

It is not a weakly prime, because it can be changed into another prime (121113049927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556524993 + 60556524994.

It is an arithmetic number, because the mean of its divisors is an integer number (60556524994).

Almost surely, 2^121113049987 is an apocalyptic number.

121113049987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121113049987 is an equidigital number, since it uses as much as digits as its factorization.

121113049987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 121113049987 in words is "one hundred twenty-one billion, one hundred thirteen million, forty-nine thousand, nine hundred eighty-seven".