221221112110 has 8 divisors (see below), whose sum is σ = 398198001816. Its totient is φ = 88488444840.

The previous prime is 221221112107. The next prime is 221221112137. The reversal of 221221112110 is 11211122122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11061055596 + ... + 11061055615.

It is an arithmetic number, because the mean of its divisors is an integer number (49774750227).

Almost surely, 2^221221112110 is an apocalyptic number.

221221112110 is a deficient number, since it is larger than the sum of its proper divisors (176976889706).

221221112110 is a wasteful number, since it uses less digits than its factorization.

221221112110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22122111218.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221221112110 its reverse (11211122122), we get a palindrome (232432234232).

The spelling of 221221112110 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, one hundred ten".