39999934121 has 8 divisors (see below), whose sum is σ = 45910410624. Its totient is φ = 34138507680.

The previous prime is 39999934103. The next prime is 39999934127. The reversal of 39999934121 is 12143999993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39999934121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39999934127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12260765 + ... + 12264026.

It is an arithmetic number, because the mean of its divisors is an integer number (5738801328).

Almost surely, 2^39999934121 is an apocalyptic number.

It is an amenable number.

39999934121 is a deficient number, since it is larger than the sum of its proper divisors (5910476503).

39999934121 is a wasteful number, since it uses less digits than its factorization.

39999934121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24525031.

The product of its digits is 4251528, while the sum is 59.

The spelling of 39999934121 in words is "thirty-nine billion, nine hundred ninety-nine million, nine hundred thirty-four thousand, one hundred twenty-one".