3947512012099 has 4 divisors (see below), whose sum is σ = 4179718601064. Its totient is φ = 3715305423136.

The previous prime is 3947512012069. The next prime is 3947512012121. The reversal of 3947512012099 is 9902102157493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3947512012099 - 2⁹ = 3947512011587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3947512012009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116103294457 + ... + 116103294490.

It is an arithmetic number, because the mean of its divisors is an integer number (1044929650266).

Almost surely, 2^{3947512012099} is an apocalyptic number.

3947512012099 is a deficient number, since it is larger than the sum of its proper divisors (232206588965).

3947512012099 is a wasteful number, since it uses less digits than its factorization.

3947512012099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232206588964.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 3947512012099 in words is "three trillion, nine hundred forty-seven billion, five hundred twelve million, twelve thousand, ninety-nine".