212112230121 has 32 divisors (see below), whose sum is σ = 343548272640. Its totient is φ = 128275131600.

The previous prime is 212112230111. The next prime is 212112230147. The reversal of 212112230121 is 121032211212.

It is not a de Polignac number, because 212112230121 - 2⁵ = 212112230089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212112230094 and 212112230103.

It is not an unprimeable number, because it can be changed into a prime (212112230111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 633745 + ... + 908766.

It is an arithmetic number, because the mean of its divisors is an integer number (10735883520).

Almost surely, 2^212112230121 is an apocalyptic number.

It is an amenable number.

212112230121 is a deficient number, since it is larger than the sum of its proper divisors (131436042519).

212112230121 is a wasteful number, since it uses less digits than its factorization.

212112230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542994 (or 1542988 counting only the distinct ones).

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

Adding to 212112230121 its reverse (121032211212), we get a palindrome (333144441333).

The spelling of 212112230121 in words is "two hundred twelve billion, one hundred twelve million, two hundred thirty thousand, one hundred twenty-one".