221220334211231 has 8 divisors (see below), whose sum is σ = 226616416882128. Its totient is φ = 215824273672000.

The previous prime is 221220334211221. The next prime is 221220334211273. The reversal of 221220334211231 is 132112433022122.

221220334211231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221220334211231 is a prime.

It is a super-2 number, since 2×221220334211231² (a number of 29 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 = 221220334211194 and 221220334211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220334211221) 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, 15682361 + ... + 26236941.

It is an arithmetic number, because the mean of its divisors is an integer number (28327052110266).

Almost surely, 2^{221220334211231} is an apocalyptic number.

221220334211231 is a deficient number, since it is larger than the sum of its proper divisors (5396082670897).

221220334211231 is a wasteful number, since it uses less digits than its factorization.

221220334211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11065833.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 221220334211231 its reverse (132112433022122), we get a palindrome (353332767233353).

The spelling of 221220334211231 in words is "two hundred twenty-one trillion, two hundred twenty billion, three hundred thirty-four million, two hundred eleven thousand, two hundred thirty-one".