213221331011 has 4 divisors (see below), whose sum is σ = 229622971872. Its totient is φ = 196819690152.

The previous prime is 213221330999. The next prime is 213221331013. The reversal of 213221331011 is 110133122312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 213221331011 - 2¹⁰ = 213221329987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213221331013) 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, 8200820411 + ... + 8200820436.

It is an arithmetic number, because the mean of its divisors is an integer number (57405742968).

Almost surely, 2^213221331011 is an apocalyptic number.

213221331011 is a deficient number, since it is larger than the sum of its proper divisors (16401640861).

213221331011 is a wasteful number, since it uses less digits than its factorization.

213221331011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16401640860.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213221331011 its reverse (110133122312), we get a palindrome (323354453323).

The spelling of 213221331011 in words is "two hundred thirteen billion, two hundred twenty-one million, three hundred thirty-one thousand, eleven".