212201111121 has 8 divisors (see below), whose sum is σ = 287157722784. Its totient is φ = 139355953440.

The previous prime is 212201111113. The next prime is 212201111131. The reversal of 212201111121 is 121111102212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212201111121 - 2³ = 212201111113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212201111121.

It is not an unprimeable number, because it can be changed into a prime (212201111131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527863260 + ... + 527863661.

It is an arithmetic number, because the mean of its divisors is an integer number (35894715348).

Almost surely, 2^212201111121 is an apocalyptic number.

It is an amenable number.

212201111121 is a deficient number, since it is larger than the sum of its proper divisors (74956611663).

212201111121 is a wasteful number, since it uses less digits than its factorization.

212201111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055726991.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212201111121 its reverse (121111102212), we get a palindrome (333312213333).

The spelling of 212201111121 in words is "two hundred twelve billion, two hundred one million, one hundred eleven thousand, one hundred twenty-one".