121122212213 has 4 divisors (see below), whose sum is σ = 121137616320. Its totient is φ = 121106808108.

The previous prime is 121122212207. The next prime is 121122212231. The reversal of 121122212213 is 312212221121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312212221121 = 278689 ⋅1120289.

It is a cyclic number.

It is not a de Polignac number, because 121122212213 - 2⁸ = 121122211957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122212413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7690253 + ... + 7705986.

It is an arithmetic number, because the mean of its divisors is an integer number (30284404080).

Almost surely, 2^121122212213 is an apocalyptic number.

It is an amenable number.

121122212213 is a deficient number, since it is larger than the sum of its proper divisors (15404107).

121122212213 is an equidigital number, since it uses as much as digits as its factorization.

121122212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15404106.

The product of its digits is 192, while the sum is 20.

Adding to 121122212213 its reverse (312212221121), we get a palindrome (433334433334).

The spelling of 121122212213 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, two hundred thirteen".