221021013133 has 4 divisors (see below), whose sum is σ = 221207215680. Its totient is φ = 220834810588.

The previous prime is 221021013107. The next prime is 221021013211. The reversal of 221021013133 is 331310120122.

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-221021013133 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 221021013133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021019133) 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, 93099493 + ... + 93101866.

It is an arithmetic number, because the mean of its divisors is an integer number (55301803920).

Almost surely, 2^221021013133 is an apocalyptic number.

It is an amenable number.

221021013133 is a deficient number, since it is larger than the sum of its proper divisors (186202547).

221021013133 is a wasteful number, since it uses less digits than its factorization.

221021013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186202546.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221021013133 its reverse (331310120122), we get a palindrome (552331133255).

The spelling of 221021013133 in words is "two hundred twenty-one billion, twenty-one million, thirteen thousand, one hundred thirty-three".