201220121110 has 128 divisors (see below), whose sum is σ = 392029372800. Its totient is φ = 74133688320.

The previous prime is 201220121107. The next prime is 201220121117. The reversal of 201220121110 is 11121022102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220121117) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 726426292 + ... + 726426568.

It is an arithmetic number, because the mean of its divisors is an integer number (3062729475).

Almost surely, 2^201220121110 is an apocalyptic number.

201220121110 is a deficient number, since it is larger than the sum of its proper divisors (190809251690).

201220121110 is a wasteful number, since it uses less digits than its factorization.

201220121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201220121110 its reverse (11121022102), we get a palindrome (212341143212).

The spelling of 201220121110 in words is "two hundred one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred ten".