221011020211213 has 4 divisors (see below), whose sum is σ = 221155377508768. Its totient is φ = 220866662913660.

The previous prime is 221011020211181. The next prime is 221011020211381. The reversal of 221011020211213 is 312112020110122.

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 not a de Polignac number, because 221011020211213 - 2⁵ = 221011020211181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011020211013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72178646481 + ... + 72178649542.

It is an arithmetic number, because the mean of its divisors is an integer number (55288844377192).

Almost surely, 2^{221011020211213} is an apocalyptic number.

It is an amenable number.

221011020211213 is a deficient number, since it is larger than the sum of its proper divisors (144357297555).

221011020211213 is a wasteful number, since it uses less digits than its factorization.

221011020211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144357297554.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 221011020211213 its reverse (312112020110122), we get a palindrome (533123040321335).

The spelling of 221011020211213 in words is "two hundred twenty-one trillion, eleven billion, twenty million, two hundred eleven thousand, two hundred thirteen".