221204540235 has 16 divisors (see below), whose sum is σ = 404488302336. Its totient is φ = 101122075488.

The previous prime is 221204540203. The next prime is 221204540251. The reversal of 221204540235 is 532045402122.

It is not a de Polignac number, because 221204540235 - 2⁵ = 221204540203 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1053354849 + ... + 1053355058.

It is an arithmetic number, because the mean of its divisors is an integer number (25280518896).

Almost surely, 2^221204540235 is an apocalyptic number.

221204540235 is a deficient number, since it is larger than the sum of its proper divisors (183283762101).

221204540235 is a wasteful number, since it uses less digits than its factorization.

221204540235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106709922.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 221204540235 its reverse (532045402122), we get a palindrome (753249942357).

The spelling of 221204540235 in words is "two hundred twenty-one billion, two hundred four million, five hundred forty thousand, two hundred thirty-five".