222220123123111 has 4 divisors (see below), whose sum is σ = 223818829045000. Its totient is φ = 220621417201224.

The previous prime is 222220123123091. The next prime is 222220123123151. The reversal of 222220123123111 is 111321321022222.

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 222220123123111 - 2⁵ = 222220123123079 is a prime.

It is a super-2 number, since 2×222220123123111² (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 (222220123123151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799352960736 + ... + 799352961013.

It is an arithmetic number, because the mean of its divisors is an integer number (55954707261250).

Almost surely, 2^{222220123123111} is an apocalyptic number.

222220123123111 is a deficient number, since it is larger than the sum of its proper divisors (1598705921889).

222220123123111 is a wasteful number, since it uses less digits than its factorization.

222220123123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598705921888.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 222220123123111 its reverse (111321321022222), we get a palindrome (333541444145333).

The spelling of 222220123123111 in words is "two hundred twenty-two trillion, two hundred twenty billion, one hundred twenty-three million, one hundred twenty-three thousand, one hundred eleven".