2122221212122 has 24 divisors (see below), whose sum is σ = 3499227834228. Its totient is φ = 964592608320.

The previous prime is 2122221212051. The next prime is 2122221212129. The reversal of 2122221212122 is 2212121222212.

It can be written as a sum of positive squares in 2 ways, for example, as 2121453423441 + 767788681 = 1456521^2 + 27709^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

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

It is a junction number, because it is equal to n+sod(n) for n = 2122221212093 and 2122221212102.

It is not an unprimeable number, because it can be changed into a prime (2122221212129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4314588 + ... + 4781224.

Almost surely, 2^{2122221212122} is an apocalyptic number.

2122221212122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2122221212122 is a deficient number, since it is larger than the sum of its proper divisors (1377006622106).

2122221212122 is a wasteful number, since it uses less digits than its factorization.

2122221212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485454 (or 485443 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

Adding to 2122221212122 its reverse (2212121222212), we get a palindrome (4334342434334).

The spelling of 2122221212122 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".