10121221110 has 512 divisors, whose sum is σ = 34111881216. Its totient is φ = 1854720000.

The previous prime is 10121221049. The next prime is 10121221111. The reversal of 10121221110 is 1112212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121221111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 100210060 + ... + 100210160.

It is an arithmetic number, because the mean of its divisors is an integer number (66624768).

Almost surely, 2^10121221110 is an apocalyptic number.

10121221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10121221110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17055940608).

10121221110 is an abundant number, since it is smaller than the sum of its proper divisors (23990660106).

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

10121221110 is a wasteful number, since it uses less digits than its factorization.

10121221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260.

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

Adding to 10121221110 its reverse (1112212101), we get a palindrome (11233433211).

Subtracting from 10121221110 its reverse (1112212101), we obtain a palindrome (9009009009).

The spelling of 10121221110 in words is "ten billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred ten".