20212121121122 has 12 divisors (see below), whose sum is σ = 35268088895190. Its totient is φ = 8662337623296.

The previous prime is 20212121121091. The next prime is 20212121121149. The reversal of 20212121121122 is 22112112121202.

It can be written as a sum of positive squares in only one way, i.e., 18644269045801 + 1567852075321 = 4317901^2 + 1252139^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20212121121094 and 20212121121103.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103123066847 + ... + 103123067042.

Almost surely, 2^{20212121121122} is an apocalyptic number.

20212121121122 is a deficient number, since it is larger than the sum of its proper divisors (15055967774068).

20212121121122 is a wasteful number, since it uses less digits than its factorization.

20212121121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206246133905 (or 206246133898 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20212121121122 its reverse (22112112121202), we get a palindrome (42324233242324).

The spelling of 20212121121122 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".