2121022121222 has 16 divisors (see below), whose sum is σ = 3214331415792. Its totient is φ = 1049586799200.

The previous prime is 2121022121221. The next prime is 2121022121263. The reversal of 2121022121222 is 2221212201212.

It is a junction number, because it is equal to n+sod(n) for n = 2121022121194 and 2121022121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121022121221) 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, 1619168 + ... + 2619875.

It is an arithmetic number, because the mean of its divisors is an integer number (200895713487).

Almost surely, 2^{2121022121222} is an apocalyptic number.

2121022121222 is a deficient number, since it is larger than the sum of its proper divisors (1093309294570).

2121022121222 is a wasteful number, since it uses less digits than its factorization.

2121022121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241623.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2121022121222 its reverse (2221212201212), we get a palindrome (4342234322434).

The spelling of 2121022121222 in words is "two trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".