1212022121121 has 72 divisors (see below), whose sum is σ = 2064300421248. Its totient is φ = 683189640000.

The previous prime is 1212022121119. The next prime is 1212022121131. The reversal of 1212022121121 is 1211212202121.

1212022121121 is a `hidden beast` number, since 1 + 212 + 0 + 221 + 211 + 21 = 666.

It is not a de Polignac number, because 1212022121121 - 2¹ = 1212022121119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212022121094 and 1212022121103.

It is not an unprimeable number, because it can be changed into a prime (1212022121131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12020406 + ... + 12120816.

It is an arithmetic number, because the mean of its divisors is an integer number (28670839184).

Almost surely, 2^{1212022121121} is an apocalyptic number.

It is an amenable number.

1212022121121 is a deficient number, since it is larger than the sum of its proper divisors (852278300127).

1212022121121 is a wasteful number, since it uses less digits than its factorization.

1212022121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100803 (or 100793 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212022121121 its reverse (1211212202121), we get a palindrome (2423234323242).

The spelling of 1212022121121 in words is "one trillion, two hundred twelve billion, twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".