213013212011221 has 4 divisors (see below), whose sum is σ = 216623605435200. Its totient is φ = 209402818587244.

The previous prime is 213013212011167. The next prime is 213013212011377. The reversal of 213013212011221 is 122110212310312.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-213013212011221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213013212011192 and 213013212011201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213013212018221) 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, 1805196711901 + ... + 1805196712018.

It is an arithmetic number, because the mean of its divisors is an integer number (54155901358800).

Almost surely, 2^{213013212011221} is an apocalyptic number.

It is an amenable number.

213013212011221 is a deficient number, since it is larger than the sum of its proper divisors (3610393423979).

213013212011221 is an equidigital number, since it uses as much as digits as its factorization.

213013212011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610393423978.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 213013212011221 its reverse (122110212310312), we get a palindrome (335123424321533).

The spelling of 213013212011221 in words is "two hundred thirteen trillion, thirteen billion, two hundred twelve million, eleven thousand, two hundred twenty-one".