212022121 has 16 divisors (see below), whose sum is σ = 230137600. Its totient is φ = 194676048.

The previous prime is 212022091. The next prime is 212022143. The reversal of 212022121 is 121220212.

It is a happy number.

212022121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212022121 - 2⁷ = 212021993 is a prime.

It is a super-3 number, since 3×212022121³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212022191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112630 + ... + 114496.

It is an arithmetic number, because the mean of its divisors is an integer number (14383600).

Almost surely, 2^212022121 is an apocalyptic number.

It is an amenable number.

212022121 is a deficient number, since it is larger than the sum of its proper divisors (18115479).

212022121 is a wasteful number, since it uses less digits than its factorization.

212022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212022121 is about 14560.9793970049. The cubic root of 212022121 is about 596.2939342974.

Adding to 212022121 its reverse (121220212), we get a palindrome (333242333).

The spelling of 212022121 in words is "two hundred twelve million, twenty-two thousand, one hundred twenty-one".