122212121212221 has 8 divisors (see below), whose sum is σ = 167353535353824. Its totient is φ = 79272727272720.

The previous prime is 122212121212211. The next prime is 122212121212231.

122212121212221 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (122212121212211) and next prime (122212121212231).

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

It is not a de Polignac number, because 122212121212221 - 2⁵ = 122212121212189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122212121212191 and 122212121212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122212121212211) 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, 550505050395 + ... + 550505050616.

It is an arithmetic number, because the mean of its divisors is an integer number (20919191919228).

Almost surely, 2^{122212121212221} is an apocalyptic number.

It is an amenable number.

122212121212221 is a deficient number, since it is larger than the sum of its proper divisors (45141414141603).

122212121212221 is a wasteful number, since it uses less digits than its factorization.

122212121212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101010101051.

The product of its digits is 512, while the sum is 24.

The spelling of 122212121212221 in words is "one hundred twenty-two trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-one".