122155332231 has 4 divisors (see below), whose sum is σ = 162873776312. Its totient is φ = 81436888152.

The previous prime is 122155332203. The next prime is 122155332239. The reversal of 122155332231 is 132233551221.

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

It is not a de Polignac number, because 122155332231 - 2¹¹ = 122155330183 is a prime.

It is a super-2 number, since 2×122155332231² (a number of 23 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 (122155332239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20359222036 + ... + 20359222041.

It is an arithmetic number, because the mean of its divisors is an integer number (40718444078).

Almost surely, 2^122155332231 is an apocalyptic number.

122155332231 is a deficient number, since it is larger than the sum of its proper divisors (40718444081).

122155332231 is an equidigital number, since it uses as much as digits as its factorization.

122155332231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40718444080.

The product of its digits is 10800, while the sum is 30.

Adding to 122155332231 its reverse (132233551221), we get a palindrome (254388883452).

The spelling of 122155332231 in words is "one hundred twenty-two billion, one hundred fifty-five million, three hundred thirty-two thousand, two hundred thirty-one".