221303211122321 has 4 divisors (see below), whose sum is σ = 221323114291200. Its totient is φ = 221283307953444.

The previous prime is 221303211122317. The next prime is 221303211122387. The reversal of 221303211122321 is 123221112303122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221303211122321 - 2² = 221303211122317 is a prime.

It is a super-2 number, since 2×221303211122321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221303211122221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9951567761 + ... + 9951589998.

It is an arithmetic number, because the mean of its divisors is an integer number (55330778572800).

Almost surely, 2^{221303211122321} is an apocalyptic number.

It is an amenable number.

221303211122321 is a deficient number, since it is larger than the sum of its proper divisors (19903168879).

221303211122321 is a wasteful number, since it uses less digits than its factorization.

221303211122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19903168878.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 221303211122321 its reverse (123221112303122), we get a palindrome (344524323425443).

The spelling of 221303211122321 in words is "two hundred twenty-one trillion, three hundred three billion, two hundred eleven million, one hundred twenty-two thousand, three hundred twenty-one".