22105421421 has 8 divisors (see below), whose sum is σ = 29913804384. Its totient is φ = 14516993040.

The previous prime is 22105421363. The next prime is 22105421449. The reversal of 22105421421 is 12412450122.

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

It is not a de Polignac number, because 22105421421 - 2⁷ = 22105421293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22105421391 and 22105421400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22105421021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54988410 + ... + 54988811.

It is an arithmetic number, because the mean of its divisors is an integer number (3739225548).

Almost surely, 2^22105421421 is an apocalyptic number.

It is an amenable number.

22105421421 is a deficient number, since it is larger than the sum of its proper divisors (7808382963).

22105421421 is a wasteful number, since it uses less digits than its factorization.

22105421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109977291.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 22105421421 its reverse (12412450122), we get a palindrome (34517871543).

The spelling of 22105421421 in words is "twenty-two billion, one hundred five million, four hundred twenty-one thousand, four hundred twenty-one".