10221121110 has 48 divisors (see below), whose sum is σ = 25643654064. Its totient is φ = 2607122496.

The previous prime is 10221121103. The next prime is 10221121111. The reversal of 10221121110 is 1112112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221121111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 306157 + ... + 337896.

It is an arithmetic number, because the mean of its divisors is an integer number (534242793).

Almost surely, 2^10221121110 is an apocalyptic number.

10221121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10221121110 is an abundant number, since it is smaller than the sum of its proper divisors (15422532954).

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

10221121110 is a wasteful number, since it uses less digits than its factorization.

10221121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644109 (or 644086 counting only the distinct ones).

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

Adding to 10221121110 its reverse (1112112201), we get a palindrome (11333233311).

It can be divided in two parts, 102211 and 21110, that added together give a palindrome (123321).

The spelling of 10221121110 in words is "ten billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred ten".