221231132122 has 64 divisors (see below), whose sum is σ = 445641331968. Its totient is φ = 79548480000.

The previous prime is 221231132099. The next prime is 221231132147.

221231132122 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 221231132093 and 221231132102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19816222 + ... + 19827382.

It is an arithmetic number, because the mean of its divisors is an integer number (6963145812).

Almost surely, 2^221231132122 is an apocalyptic number.

221231132122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221231132122 is an abundant number, since it is smaller than the sum of its proper divisors (224410199846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221231132122 is a wasteful number, since it uses less digits than its factorization.

221231132122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21095.

The product of its digits is 576, while the sum is 22.

It can be divided in two parts, 221231 and 132122, that added together give a palindrome (353353).

The spelling of 221231132122 in words is "two hundred twenty-one billion, two hundred thirty-one million, one hundred thirty-two thousand, one hundred twenty-two".