221234021013 has 16 divisors (see below), whose sum is σ = 307915430400. Its totient is φ = 141127895040.

The previous prime is 221234021003. The next prime is 221234021033. The reversal of 221234021013 is 310120432122.

It is not a de Polignac number, because 221234021013 - 2⁶ = 221234020949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221234021003) 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, 13356108 + ... + 13372661.

It is an arithmetic number, because the mean of its divisors is an integer number (19244714400).

Almost surely, 2^221234021013 is an apocalyptic number.

It is an amenable number.

221234021013 is a deficient number, since it is larger than the sum of its proper divisors (86681409387).

221234021013 is a wasteful number, since it uses less digits than its factorization.

221234021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26728892.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221234021013 its reverse (310120432122), we get a palindrome (531354453135).

The spelling of 221234021013 in words is "two hundred twenty-one billion, two hundred thirty-four million, twenty-one thousand, thirteen".