212201211401 has 4 divisors (see below), whose sum is σ = 212217168900. Its totient is φ = 212185253904.

The previous prime is 212201211331. The next prime is 212201211407. The reversal of 212201211401 is 104112102212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45475989001 + 166725222400 = 213251^2 + 408320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212201211401 is a prime.

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 212201211401.

It is not an unprimeable number, because it can be changed into a prime (212201211407) 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, 7958786 + ... + 7985403.

It is an arithmetic number, because the mean of its divisors is an integer number (53054292225).

Almost surely, 2^212201211401 is an apocalyptic number.

It is an amenable number.

212201211401 is a deficient number, since it is larger than the sum of its proper divisors (15957499).

212201211401 is a wasteful number, since it uses less digits than its factorization.

212201211401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15957498.

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

Adding to 212201211401 its reverse (104112102212), we get a palindrome (316313313613).

The spelling of 212201211401 in words is "two hundred twelve billion, two hundred one million, two hundred eleven thousand, four hundred one".