2121121212222 has 32 divisors (see below), whose sum is σ = 4466198880000. Its totient is φ = 669725670528.

The previous prime is 2121121212209. The next prime is 2121121212277. The reversal of 2121121212222 is 2222121211212.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664722 + ... + 2164277.

It is an arithmetic number, because the mean of its divisors is an integer number (139568715000).

Almost surely, 2^{2121121212222} is an apocalyptic number.

2121121212222 is an abundant number, since it is smaller than the sum of its proper divisors (2345077667778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121121212222 is a wasteful number, since it uses less digits than its factorization.

2121121212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835600.

The product of its digits is 256, while the sum is 21.

Adding to 2121121212222 its reverse (2222121211212), we get a palindrome (4343242423434).

The spelling of 2121121212222 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".