2121022233121 has 16 divisors (see below), whose sum is σ = 2449998145728. Its totient is φ = 1814743321600.

The previous prime is 2121022233073. The next prime is 2121022233137. The reversal of 2121022233121 is 1213322201212.

It is not a de Polignac number, because 2121022233121 - 2⁷ = 2121022232993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121022233092 and 2121022233101.

It is not an unprimeable number, because it can be changed into a prime (2121022233821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15611001 + ... + 15746281.

It is an arithmetic number, because the mean of its divisors is an integer number (153124884108).

Almost surely, 2^{2121022233121} is an apocalyptic number.

It is an amenable number.

2121022233121 is a deficient number, since it is larger than the sum of its proper divisors (328975912607).

2121022233121 is a wasteful number, since it uses less digits than its factorization.

2121022233121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219152.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2121022233121 its reverse (1213322201212), we get a palindrome (3334344434333).

The spelling of 2121022233121 in words is "two trillion, one hundred twenty-one billion, twenty-two million, two hundred thirty-three thousand, one hundred twenty-one".