122121222121221 has 8 divisors (see below), whose sum is σ = 164889413834880. Its totient is φ = 80383589244192.

The previous prime is 122121222121181. The next prime is 122121222121247.

122121222121221 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 122121222121221 - 2¹⁷ = 122121221990149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122121222121191 and 122121222121200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121222121271) 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, 257639708880 + ... + 257639709353.

It is an arithmetic number, because the mean of its divisors is an integer number (20611176729360).

Almost surely, 2^{122121222121221} is an apocalyptic number.

It is an amenable number.

122121222121221 is a deficient number, since it is larger than the sum of its proper divisors (42768191713659).

122121222121221 is an equidigital number, since it uses as much as digits as its factorization.

122121222121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515279418315.

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

The spelling of 122121222121221 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".