212230121121 has 24 divisors (see below), whose sum is σ = 311793791400. Its totient is φ = 139088249856.

The previous prime is 212230121053. The next prime is 212230121143. The reversal of 212230121121 is 121121032212.

212230121121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9089715600 + 203140405521 = 95340^2 + 450711^2 .

It is not a de Polignac number, because 212230121121 - 2¹⁰ = 212230120097 is a prime.

It is a super-2 number, since 2×212230121121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212230121094 and 212230121103.

It is not an unprimeable number, because it can be changed into a prime (212230121021) 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 23 ways as a sum of consecutive naturals, for example, 685710 + ... + 945863.

It is an arithmetic number, because the mean of its divisors is an integer number (12991407975).

Almost surely, 2^212230121121 is an apocalyptic number.

It is an amenable number.

212230121121 is a deficient number, since it is larger than the sum of its proper divisors (99563670279).

212230121121 is a wasteful number, since it uses less digits than its factorization.

212230121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631825 (or 1631822 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212230121121 its reverse (121121032212), we get a palindrome (333351153333).

The spelling of 212230121121 in words is "two hundred twelve billion, two hundred thirty million, one hundred twenty-one thousand, one hundred twenty-one".