21222740110 has 32 divisors (see below), whose sum is σ = 44879419872. Its totient is φ = 7123716480.

The previous prime is 21222740101. The next prime is 21222740117. The reversal of 21222740110 is 1104722212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222740117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7419109 + ... + 7421968.

It is an arithmetic number, because the mean of its divisors is an integer number (1402481871).

Almost surely, 2^21222740110 is an apocalyptic number.

21222740110 is an abundant number, since it is smaller than the sum of its proper divisors (23656679762).

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

21222740110 is a wasteful number, since it uses less digits than its factorization.

21222740110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14841108.

The product of its (nonzero) digits is 448, while the sum is 22.

The spelling of 21222740110 in words is "twenty-one billion, two hundred twenty-two million, seven hundred forty thousand, one hundred ten".