122122231213 has 4 divisors (see below), whose sum is σ = 122187854908. Its totient is φ = 122056607520.

The previous prime is 122122231199. The next prime is 122122231219. The reversal of 122122231213 is 312132221221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312132221221 = 417187 ⋅748183.

It can be written as a sum of positive squares in 2 ways, for example, as 47263629604 + 74858601609 = 217402^2 + 273603^2 .

It is a cyclic number.

It is not a de Polignac number, because 122122231213 - 2¹⁷ = 122122100141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122231219) 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, 32809056 + ... + 32812777.

It is an arithmetic number, because the mean of its divisors is an integer number (30546963727).

Almost surely, 2^122122231213 is an apocalyptic number.

It is an amenable number.

122122231213 is a deficient number, since it is larger than the sum of its proper divisors (65623695).

122122231213 is an equidigital number, since it uses as much as digits as its factorization.

122122231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65623694.

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

Adding to 122122231213 its reverse (312132221221), we get a palindrome (434254452434).

The spelling of 122122231213 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred thirty-one thousand, two hundred thirteen".