122310111221 has 4 divisors (see below), whose sum is σ = 122695947852. Its totient is φ = 121924274592.

The previous prime is 122310111179. The next prime is 122310111223. The reversal of 122310111221 is 122111013221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122111013221 = 78121 ⋅1563101.

It can be written as a sum of positive squares in 2 ways, for example, as 35208394321 + 87101716900 = 187639^2 + 295130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122310111221 is a prime.

It is a super-2 number, since 2×122310111221² (a number of 23 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 122310111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122310111223) 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, 192917840 + ... + 192918473.

It is an arithmetic number, because the mean of its divisors is an integer number (30673986963).

Almost surely, 2^122310111221 is an apocalyptic number.

It is an amenable number.

122310111221 is a deficient number, since it is larger than the sum of its proper divisors (385836631).

122310111221 is an equidigital number, since it uses as much as digits as its factorization.

122310111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385836630.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 122310111221 its reverse (122111013221), we get a palindrome (244421124442).

The spelling of 122310111221 in words is "one hundred twenty-two billion, three hundred ten million, one hundred eleven thousand, two hundred twenty-one".