122122212121 has 16 divisors (see below), whose sum is σ = 150408010368. Its totient is φ = 96557472000.

The previous prime is 122122212083. The next prime is 122122212139. The reversal of 122122212121 is 121212221221.

It is a cyclic number.

It is not a de Polignac number, because 122122212121 - 2¹⁷ = 122122081049 is a prime.

122122212121 is a modest number, since divided by 212121 gives 122122 as remainder.

It is not an unprimeable number, because it can be changed into a prime (122122212721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330400 + ... + 594481.

It is an arithmetic number, because the mean of its divisors is an integer number (9400500648).

Almost surely, 2^122122212121 is an apocalyptic number.

It is an amenable number.

122122212121 is a deficient number, since it is larger than the sum of its proper divisors (28285798247).

122122212121 is a wasteful number, since it uses less digits than its factorization.

122122212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926352.

The product of its digits is 128, while the sum is 19.

Adding to 122122212121 its reverse (121212221221), we get a palindrome (243334433342).

The spelling of 122122212121 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".