722200011221 has 4 divisors (see below), whose sum is σ = 777753858252. Its totient is φ = 666646164192.

The previous prime is 722200011139. The next prime is 722200011259. The reversal of 722200011221 is 122110002227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 61253775025 + 660946236196 = 247495^2 + 812986^2 .

It is a cyclic number.

It is not a de Polignac number, because 722200011221 - 2²² = 722195816917 is a prime.

It is a super-2 number, since 2×722200011221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722200011193 and 722200011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722200011121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27776923496 + ... + 27776923521.

It is an arithmetic number, because the mean of its divisors is an integer number (194438464563).

Almost surely, 2^722200011221 is an apocalyptic number.

It is an amenable number.

722200011221 is a deficient number, since it is larger than the sum of its proper divisors (55553847031).

722200011221 is a wasteful number, since it uses less digits than its factorization.

722200011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55553847030.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 722200011221 its reverse (122110002227), we get a palindrome (844310013448).

The spelling of 722200011221 in words is "seven hundred twenty-two billion, two hundred million, eleven thousand, two hundred twenty-one".