11993129021 has 8 divisors (see below), whose sum is σ = 12028279584. Its totient is φ = 11958004080.

The previous prime is 11993128997. The next prime is 11993129041. The reversal of 11993129021 is 12092139911.

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-11993129021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11993129041) 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, 1314686 + ... + 1323776.

It is an arithmetic number, because the mean of its divisors is an integer number (1503534948).

Almost surely, 2^11993129021 is an apocalyptic number.

It is an amenable number.

11993129021 is a deficient number, since it is larger than the sum of its proper divisors (35150563).

11993129021 is an equidigital number, since it uses as much as digits as its factorization.

11993129021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12811.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 11993129021 in words is "eleven billion, nine hundred ninety-three million, one hundred twenty-nine thousand, twenty-one".