221200023021 has 8 divisors (see below), whose sum is σ = 294939317664. Its totient is φ = 147463705200.

The previous prime is 221200023007. The next prime is 221200023049. The reversal of 221200023021 is 120320002122.

It is a happy number.

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

It is not a de Polignac number, because 221200023021 - 2⁶ = 221200022957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200023221) 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, 564630 + ... + 872471.

It is an arithmetic number, because the mean of its divisors is an integer number (36867414708).

Almost surely, 2^221200023021 is an apocalyptic number.

It is an amenable number.

221200023021 is a deficient number, since it is larger than the sum of its proper divisors (73739294643).

221200023021 is a wasteful number, since it uses less digits than its factorization.

221200023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488411.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 221200023021 its reverse (120320002122), we get a palindrome (341520025143).

The spelling of 221200023021 in words is "two hundred twenty-one billion, two hundred million, twenty-three thousand, twenty-one".