21223440101 has 12 divisors (see below), whose sum is σ = 22560816000. Its totient is φ = 19961269440.

The previous prime is 21223440053. The next prime is 21223440107. The reversal of 21223440101 is 10104432212.

It is not a de Polignac number, because 21223440101 - 2²² = 21219245797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223440107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 408716 + ... + 457706.

It is an arithmetic number, because the mean of its divisors is an integer number (1880068000).

Almost surely, 2^21223440101 is an apocalyptic number.

It is an amenable number.

21223440101 is a deficient number, since it is larger than the sum of its proper divisors (1337375899).

21223440101 is a wasteful number, since it uses less digits than its factorization.

21223440101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50524 (or 50507 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21223440101 its reverse (10104432212), we get a palindrome (31327872313).

The spelling of 21223440101 in words is "twenty-one billion, two hundred twenty-three million, four hundred forty thousand, one hundred one".