221351235027 has 32 divisors (see below), whose sum is σ = 322527453696. Its totient is φ = 134210131200.

The previous prime is 221351234987. The next prime is 221351235047. The reversal of 221351235027 is 720532153122.

It is not a de Polignac number, because 221351235027 - 2⁶ = 221351234963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221351235047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2724402 + ... + 2804472.

It is an arithmetic number, because the mean of its divisors is an integer number (10078982928).

Almost surely, 2^221351235027 is an apocalyptic number.

221351235027 is a deficient number, since it is larger than the sum of its proper divisors (101176218669).

221351235027 is a wasteful number, since it uses less digits than its factorization.

221351235027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81131.

The product of its (nonzero) digits is 25200, while the sum is 33.

Adding to 221351235027 its reverse (720532153122), we get a palindrome (941883388149).

The spelling of 221351235027 in words is "two hundred twenty-one billion, three hundred fifty-one million, two hundred thirty-five thousand, twenty-seven".