201221101110 has 16 divisors (see below), whose sum is σ = 482930642736. Its totient is φ = 53658960288.

The previous prime is 201221101087. The next prime is 201221101181. The reversal of 201221101110 is 11101122102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3353684989 + ... + 3353685048.

It is an arithmetic number, because the mean of its divisors is an integer number (30183165171).

Almost surely, 2^201221101110 is an apocalyptic number.

201221101110 is an abundant number, since it is smaller than the sum of its proper divisors (281709541626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201221101110 is a wasteful number, since it uses less digits than its factorization.

201221101110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707370047.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201221101110 its reverse (11101122102), we get a palindrome (212322223212).

The spelling of 201221101110 in words is "two hundred one billion, two hundred twenty-one million, one hundred one thousand, one hundred ten".