212010013121 has 4 divisors (see below), whose sum is σ = 216520864512. Its totient is φ = 207499161732.

The previous prime is 212010013109. The next prime is 212010013151. The reversal of 212010013121 is 121310010212.

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 212010013121 - 2⁶ = 212010013057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212010013096 and 212010013105.

It is not an unprimeable number, because it can be changed into a prime (212010013151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255425625 + ... + 2255425718.

It is an arithmetic number, because the mean of its divisors is an integer number (54130216128).

Almost surely, 2^212010013121 is an apocalyptic number.

It is an amenable number.

212010013121 is a deficient number, since it is larger than the sum of its proper divisors (4510851391).

212010013121 is an equidigital number, since it uses as much as digits as its factorization.

212010013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510851390.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 212010013121 its reverse (121310010212), we get a palindrome (333320023333).

The spelling of 212010013121 in words is "two hundred twelve billion, ten million, thirteen thousand, one hundred twenty-one".