21022221110 has 32 divisors (see below), whose sum is σ = 43452633600. Its totient is φ = 7242104160.

The previous prime is 21022221107. The next prime is 21022221163. The reversal of 21022221110 is 1112222012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5027150 + ... + 5031329.

It is an arithmetic number, because the mean of its divisors is an integer number (1357894800).

Almost surely, 2^21022221110 is an apocalyptic number.

21022221110 is an abundant number, since it is smaller than the sum of its proper divisors (22430412490).

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

21022221110 is a wasteful number, since it uses less digits than its factorization.

21022221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10058516.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21022221110 its reverse (1112222012), we get a palindrome (22134443122).

The spelling of 21022221110 in words is "twenty-one billion, twenty-two million, two hundred twenty-one thousand, one hundred ten".