721200022 has 4 divisors (see below), whose sum is σ = 1081800036. Its totient is φ = 360600010.

The previous prime is 721200001. The next prime is 721200023. The reversal of 721200022 is 220002127.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 721199969 and 721200005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180300004 + ... + 180300007.

It is an arithmetic number, because the mean of its divisors is an integer number (270450009).

Almost surely, 2^721200022 is an apocalyptic number.

721200022 is a deficient number, since it is larger than the sum of its proper divisors (360600014).

721200022 is a wasteful number, since it uses less digits than its factorization.

721200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360600013.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 721200022 is about 26855.1675101832. The cubic root of 721200022 is about 896.7786159168.

Adding to 721200022 its reverse (220002127), we get a palindrome (941202149).

The spelling of 721200022 in words is "seven hundred twenty-one million, two hundred thousand, twenty-two".