122221123211231 has 4 divisors (see below), whose sum is σ = 133332134412264. Its totient is φ = 111110112010200.

The previous prime is 122221123211219. The next prime is 122221123211309. The reversal of 122221123211231 is 132112321122221.

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 122221123211231 - 2⁴² = 117823076700127 is a prime.

It is a super-2 number, since 2×122221123211231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122221123211231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221125211231) 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, 5555505600500 + ... + 5555505600521.

It is an arithmetic number, because the mean of its divisors is an integer number (33333033603066).

Almost surely, 2^{122221123211231} is an apocalyptic number.

122221123211231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122221123211231 is a deficient number, since it is larger than the sum of its proper divisors (11111011201033).

122221123211231 is a wasteful number, since it uses less digits than its factorization.

122221123211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111011201032.

The product of its digits is 1152, while the sum is 26.

Adding to 122221123211231 its reverse (132112321122221), we get a palindrome (254333444333452).

It can be divided in two parts, 1222211 and 23211231, that added together give a palindrome (24433442).

The spelling of 122221123211231 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-three million, two hundred eleven thousand, two hundred thirty-one".