72021112001 has 4 divisors (see below), whose sum is σ = 72050308272. Its totient is φ = 71991915732.

The previous prime is 72021111973. The next prime is 72021112021. The reversal of 72021112001 is 10021112027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72021112001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72021112021) 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, 14594435 + ... + 14599368.

It is an arithmetic number, because the mean of its divisors is an integer number (18012577068).

Almost surely, 2^72021112001 is an apocalyptic number.

It is an amenable number.

72021112001 is a deficient number, since it is larger than the sum of its proper divisors (29196271).

72021112001 is a wasteful number, since it uses less digits than its factorization.

72021112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29196270.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 72021112001 its reverse (10021112027), we get a palindrome (82042224028).

The spelling of 72021112001 in words is "seventy-two billion, twenty-one million, one hundred twelve thousand, one".