212012330121 has 32 divisors (see below), whose sum is σ = 314586155520. Its totient is φ = 141119561232.

The previous prime is 212012330107. The next prime is 212012330171. The reversal of 212012330121 is 121033210212.

212012330121 is a `hidden beast` number, since 212 + 0 + 1 + 2 + 330 + 121 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-212012330121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212012330094 and 212012330103.

It is not an unprimeable number, because it can be changed into a prime (212012330171) 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, 71551786 + ... + 71554748.

It is an arithmetic number, because the mean of its divisors is an integer number (9830817360).

Almost surely, 2^212012330121 is an apocalyptic number.

It is an amenable number.

212012330121 is a deficient number, since it is larger than the sum of its proper divisors (102573825399).

212012330121 is a wasteful number, since it uses less digits than its factorization.

212012330121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6242 (or 6236 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212012330121 its reverse (121033210212), we get a palindrome (333045540333).

The spelling of 212012330121 in words is "two hundred twelve billion, twelve million, three hundred thirty thousand, one hundred twenty-one".