212022021121 has 4 divisors (see below), whose sum is σ = 212364545200. Its totient is φ = 211679497044.

The previous prime is 212022021109. The next prime is 212022021131. The reversal of 212022021121 is 121120220212.

It is a happy number.

212022021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212022021121 - 2⁷ = 212022020993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212022021095 and 212022021104.

It is not an unprimeable number, because it can be changed into a prime (212022021131) 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 3 ways as a sum of consecutive naturals, for example, 171261111 + ... + 171262348.

It is an arithmetic number, because the mean of its divisors is an integer number (53091136300).

Almost surely, 2^212022021121 is an apocalyptic number.

It is an amenable number.

212022021121 is a deficient number, since it is larger than the sum of its proper divisors (342524079).

212022021121 is an equidigital number, since it uses as much as digits as its factorization.

212022021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342524078.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212022021121 its reverse (121120220212), we get a palindrome (333142241333).

The spelling of 212022021121 in words is "two hundred twelve billion, twenty-two million, twenty-one thousand, one hundred twenty-one".