213121021201 has 16 divisors (see below), whose sum is σ = 235647115200. Its totient is φ = 191127121920.

The previous prime is 213121021189. The next prime is 213121021247. The reversal of 213121021201 is 102120121312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213121021201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213121021261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441025 + ... + 787873.

It is an arithmetic number, because the mean of its divisors is an integer number (14727944700).

Almost surely, 2^213121021201 is an apocalyptic number.

It is an amenable number.

213121021201 is a deficient number, since it is larger than the sum of its proper divisors (22526093999).

213121021201 is a wasteful number, since it uses less digits than its factorization.

213121021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347616.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 213121021201 its reverse (102120121312), we get a palindrome (315241142513).

The spelling of 213121021201 in words is "two hundred thirteen billion, one hundred twenty-one million, twenty-one thousand, two hundred one".