2220121122121 has 12 divisors (see below), whose sum is σ = 2665899229440. Its totient is φ = 1841575123080.

The previous prime is 2220121122047. The next prime is 2220121122133. The reversal of 2220121122121 is 1212211210222.

It is not a de Polignac number, because 2220121122121 - 2⁷ = 2220121121993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220121122161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 730782261 + ... + 730785298.

It is an arithmetic number, because the mean of its divisors is an integer number (222158269120).

Almost surely, 2^{2220121122121} is an apocalyptic number.

It is an amenable number.

2220121122121 is a deficient number, since it is larger than the sum of its proper divisors (445778107319).

2220121122121 is a wasteful number, since it uses less digits than its factorization.

2220121122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461567604 (or 1461567597 counting only the distinct ones).

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

Adding to 2220121122121 its reverse (1212211210222), we get a palindrome (3432332332343).

The spelling of 2220121122121 in words is "two trillion, two hundred twenty billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".