122111222221 has 8 divisors (see below), whose sum is σ = 122807836800. Its totient is φ = 121414768320.

The previous prime is 122111222153. The next prime is 122111222231. The reversal of 122111222221 is 122222111221.

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

It is a cyclic number.

It is not a de Polignac number, because 122111222221 - 2¹¹ = 122111220173 is a prime.

It is a super-2 number, since 2×122111222221² (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 (122111222231) 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, 1697301 + ... + 1767781.

It is an arithmetic number, because the mean of its divisors is an integer number (15350979600).

Almost surely, 2^122111222221 is an apocalyptic number.

It is an amenable number.

122111222221 is a deficient number, since it is larger than the sum of its proper divisors (696614579).

122111222221 is an equidigital number, since it uses as much as digits as its factorization.

122111222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80339.

The product of its digits is 128, while the sum is 19.

Adding to 122111222221 its reverse (122222111221), we get a palindrome (244333333442).

The spelling of 122111222221 in words is "one hundred twenty-two billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".