201121021110 has 32 divisors (see below), whose sum is σ = 482722479360. Its totient is φ = 53628713568.

The previous prime is 201121021061. The next prime is 201121021111. The reversal of 201121021110 is 11120121102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121021111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253959 + ... + 683181.

It is an arithmetic number, because the mean of its divisors is an integer number (15085077480).

Almost surely, 2^201121021110 is an apocalyptic number.

201121021110 is an abundant number, since it is smaller than the sum of its proper divisors (281601458250).

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

201121021110 is a wasteful number, since it uses less digits than its factorization.

201121021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444852.

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

Adding to 201121021110 its reverse (11120121102), we get a palindrome (212241142212).

The spelling of 201121021110 in words is "two hundred one billion, one hundred twenty-one million, twenty-one thousand, one hundred ten".