72021394129 has 8 divisors (see below), whose sum is σ = 77661067680. Its totient is φ = 66566628000.

The previous prime is 72021394099. The next prime is 72021394157. The reversal of 72021394129 is 92149312027.

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

It is a cyclic number.

It is not a de Polignac number, because 72021394129 - 2⁵ = 72021394097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72021394091 and 72021394100.

It is not an unprimeable number, because it can be changed into a prime (72021394229) 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, 46226047 + ... + 46227604.

It is an arithmetic number, because the mean of its divisors is an integer number (9707633460).

Almost surely, 2^72021394129 is an apocalyptic number.

It is an amenable number.

72021394129 is a deficient number, since it is larger than the sum of its proper divisors (5639673551).

72021394129 is a wasteful number, since it uses less digits than its factorization.

72021394129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92453711.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 72021394129 in words is "seventy-two billion, twenty-one million, three hundred ninety-four thousand, one hundred twenty-nine".