221540045122 has 16 divisors (see below), whose sum is σ = 362823989472. Its totient is φ = 100615599520.

The previous prime is 221540045113. The next prime is 221540045123.

It is a happy number.

221540045122 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (221540045123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4194208 + ... + 4246699.

It is an arithmetic number, because the mean of its divisors is an integer number (22676499342).

Almost surely, 2^221540045122 is an apocalyptic number.

221540045122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221540045122 is a deficient number, since it is larger than the sum of its proper divisors (141283944350).

221540045122 is a wasteful number, since it uses less digits than its factorization.

221540045122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8442113.

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 221540045122 in words is "two hundred twenty-one billion, five hundred forty million, forty-five thousand, one hundred twenty-two".