221403023021 has 8 divisors (see below), whose sum is σ = 224055936000. Its totient is φ = 218765670160.

The previous prime is 221403022991. The next prime is 221403023047. The reversal of 221403023021 is 120320304122.

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 221403023021 - 2³⁴ = 204223153837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221403022984 and 221403023002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221403023221) 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, 3861401 + ... + 3918318.

It is an arithmetic number, because the mean of its divisors is an integer number (28006992000).

Almost surely, 2^221403023021 is an apocalyptic number.

It is an amenable number.

221403023021 is a deficient number, since it is larger than the sum of its proper divisors (2652912979).

221403023021 is a wasteful number, since it uses less digits than its factorization.

221403023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780059.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221403023021 its reverse (120320304122), we get a palindrome (341723327143).

The spelling of 221403023021 in words is "two hundred twenty-one billion, four hundred three million, twenty-three thousand, twenty-one".