22052021421 has 16 divisors (see below), whose sum is σ = 30544069248. Its totient is φ = 14140761600.

The previous prime is 22052021377. The next prime is 22052021449. The reversal of 22052021421 is 12412025022.

It is not a de Polignac number, because 22052021421 - 2¹⁴ = 22052005037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22052021521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253836 + ... + 1271301.

It is an arithmetic number, because the mean of its divisors is an integer number (1909004328).

Almost surely, 2^22052021421 is an apocalyptic number.

It is an amenable number.

22052021421 is a deficient number, since it is larger than the sum of its proper divisors (8492047827).

22052021421 is a wasteful number, since it uses less digits than its factorization.

22052021421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525252.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 22052021421 its reverse (12412025022), we get a palindrome (34464046443).

The spelling of 22052021421 in words is "twenty-two billion, fifty-two million, twenty-one thousand, four hundred twenty-one".