22125042213421 has 4 divisors (see below), whose sum is σ = 25285762529632. Its totient is φ = 18964321897212.

The previous prime is 22125042213403. The next prime is 22125042213569. The reversal of 22125042213421 is 12431224052122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22125042213421 - 2⁷ = 22125042213293 is a prime.

It is a super-2 number, since 2×22125042213421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22125042213401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1580360158095 + ... + 1580360158108.

It is an arithmetic number, because the mean of its divisors is an integer number (6321440632408).

Almost surely, 2^{22125042213421} is an apocalyptic number.

It is an amenable number.

22125042213421 is a deficient number, since it is larger than the sum of its proper divisors (3160720316211).

22125042213421 is an equidigital number, since it uses as much as digits as its factorization.

22125042213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160720316210.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 22125042213421 its reverse (12431224052122), we get a palindrome (34556266265543).

The spelling of 22125042213421 in words is "twenty-two trillion, one hundred twenty-five billion, forty-two million, two hundred thirteen thousand, four hundred twenty-one".