212112122201 has 4 divisors (see below), whose sum is σ = 242413853952. Its totient is φ = 181810390452.

The previous prime is 212112122147. The next prime is 212112122221. The reversal of 212112122201 is 102221211212.

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 212112122201 - 2⁶ = 212112122137 is a prime.

It is a super-2 number, since 2×212112122201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212112122201.

It is not an unprimeable number, because it can be changed into a prime (212112122221) 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, 15150865865 + ... + 15150865878.

It is an arithmetic number, because the mean of its divisors is an integer number (60603463488).

Almost surely, 2^212112122201 is an apocalyptic number.

It is an amenable number.

212112122201 is a deficient number, since it is larger than the sum of its proper divisors (30301731751).

212112122201 is an equidigital number, since it uses as much as digits as its factorization.

212112122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30301731750.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212112122201 its reverse (102221211212), we get a palindrome (314333333413).

It can be divided in two parts, 21211 and 2122201, that added together give a palindrome (2143412).

The spelling of 212112122201 in words is "two hundred twelve billion, one hundred twelve million, one hundred twenty-two thousand, two hundred one".