22221042406 has 8 divisors (see below), whose sum is σ = 33333045120. Its totient is φ = 11110027368.

The previous prime is 22221042401. The next prime is 22221042419. The reversal of 22221042406 is 60424012222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221042401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187846 + ... + 282361.

It is an arithmetic number, because the mean of its divisors is an integer number (4166630640).

Almost surely, 2^22221042406 is an apocalyptic number.

22221042406 is a deficient number, since it is larger than the sum of its proper divisors (11112002714).

22221042406 is a wasteful number, since it uses less digits than its factorization.

22221042406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493838.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 22221042406 its reverse (60424012222), we get a palindrome (82645054628).

It can be divided in two parts, 2222 and 1042406, that multiplied together give a palindrome (2316226132).

The spelling of 22221042406 in words is "twenty-two billion, two hundred twenty-one million, forty-two thousand, four hundred six".