221403220051 has 8 divisors (see below), whose sum is σ = 238608677664. Its totient is φ = 204222682560.

The previous prime is 221403220039. The next prime is 221403220061. The reversal of 221403220051 is 150022304122.

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 221403220051 - 2⁹ = 221403219539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221403220021) 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, 6211570 + ... + 6247111.

It is an arithmetic number, because the mean of its divisors is an integer number (29826084708).

Almost surely, 2^221403220051 is an apocalyptic number.

221403220051 is a deficient number, since it is larger than the sum of its proper divisors (17205457613).

221403220051 is a wasteful number, since it uses less digits than its factorization.

221403220051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12460061.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 221403220051 its reverse (150022304122), we get a palindrome (371425524173).

The spelling of 221403220051 in words is "two hundred twenty-one billion, four hundred three million, two hundred twenty thousand, fifty-one".