1389121997092 has 24 divisors (see below), whose sum is σ = 2466442428800. Its totient is φ = 684457783776.

The previous prime is 1389121997071. The next prime is 1389121997143. The reversal of 1389121997092 is 2907991219831.

It is a self number, because there is not a number n which added to its sum of digits gives 1389121997092.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4037367 + ... + 4367902.

Almost surely, 2^{1389121997092} is an apocalyptic number.

It is an amenable number.

1389121997092 is a deficient number, since it is larger than the sum of its proper divisors (1077320431708).

1389121997092 is a wasteful number, since it uses less digits than its factorization.

1389121997092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8405875 (or 8405873 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 61.

The spelling of 1389121997092 in words is "one trillion, three hundred eighty-nine billion, one hundred twenty-one million, nine hundred ninety-seven thousand, ninety-two".