221111233213123 has 8 divisors (see below), whose sum is σ = 243600494558256. Its totient is φ = 199020011892000.

The previous prime is 221111233213033. The next prime is 221111233213139. The reversal of 221111233213123 is 321312332111122.

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-221111233213123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221111233213091 and 221111233213100.

It is not an unprimeable number, because it can be changed into a prime (221111233213193) 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, 99510004836 + ... + 99510007057.

It is an arithmetic number, because the mean of its divisors is an integer number (30450061819782).

Almost surely, 2^{221111233213123} is an apocalyptic number.

221111233213123 is a deficient number, since it is larger than the sum of its proper divisors (22489261345133).

221111233213123 is a wasteful number, since it uses less digits than its factorization.

221111233213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199020012005.

The product of its digits is 2592, while the sum is 28.

Adding to 221111233213123 its reverse (321312332111122), we get a palindrome (542423565324245).

The spelling of 221111233213123 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred thirty-three million, two hundred thirteen thousand, one hundred twenty-three".