221311122120411 has 4 divisors (see below), whose sum is σ = 295081496160552. Its totient is φ = 147540748080272.

The previous prime is 221311122120397. The next prime is 221311122120443. The reversal of 221311122120411 is 114021221113122.

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

It is a cyclic number.

It is not a de Polignac number, because 221311122120411 - 2²⁶ = 221311055011547 is a prime.

It is a super-2 number, since 2×221311122120411² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221311122120211) 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, 36885187020066 + ... + 36885187020071.

It is an arithmetic number, because the mean of its divisors is an integer number (73770374040138).

Almost surely, 2^{221311122120411} is an apocalyptic number.

221311122120411 is a deficient number, since it is larger than the sum of its proper divisors (73770374040141).

221311122120411 is an equidigital number, since it uses as much as digits as its factorization.

221311122120411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73770374040140.

The product of its (nonzero) digits is 384, while the sum is 24.

Adding to 221311122120411 its reverse (114021221113122), we get a palindrome (335332343233533).

The spelling of 221311122120411 in words is "two hundred twenty-one trillion, three hundred eleven billion, one hundred twenty-two million, one hundred twenty thousand, four hundred eleven".