221221332223301 has 4 divisors (see below), whose sum is σ = 221417276717100. Its totient is φ = 221025387729504.

The previous prime is 221221332223259. The next prime is 221221332223319. The reversal of 221221332223301 is 103322233122122.

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 48117446182276 + 173103886041025 = 6936674^2 + 13156895^2 .

It is a cyclic number.

It is not a de Polignac number, because 221221332223301 - 2³⁰ = 221220258481477 is a prime.

It is a super-2 number, since 2×221221332223301² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221332223321) 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, 97972245206 + ... + 97972247463.

It is an arithmetic number, because the mean of its divisors is an integer number (55354319179275).

Almost surely, 2^{221221332223301} is an apocalyptic number.

It is an amenable number.

221221332223301 is a deficient number, since it is larger than the sum of its proper divisors (195944493799).

221221332223301 is a wasteful number, since it uses less digits than its factorization.

221221332223301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195944493798.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 221221332223301 its reverse (103322233122122), we get a palindrome (324543565345423).

The spelling of 221221332223301 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, three hundred thirty-two million, two hundred twenty-three thousand, three hundred one".