122112222221 has 8 divisors (see below), whose sum is σ = 133844678688. Its totient is φ = 110484990000.

The previous prime is 122112222103. The next prime is 122112222259. The reversal of 122112222221 is 122222211221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122112222221 - 2¹⁴ = 122112205837 is a prime.

It is a super-2 number, since 2×122112222221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122112222193 and 122112222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122112222821) 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, 26303630 + ... + 26308271.

It is an arithmetic number, because the mean of its divisors is an integer number (16730584836).

Almost surely, 2^122112222221 is an apocalyptic number.

122112222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122112222221 is a deficient number, since it is larger than the sum of its proper divisors (11732456467).

122112222221 is a wasteful number, since it uses less digits than its factorization.

122112222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52612123.

The product of its digits is 256, while the sum is 20.

Adding to 122112222221 its reverse (122222211221), we get a palindrome (244334433442).

The spelling of 122112222221 in words is "one hundred twenty-two billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".