22051013221 has 16 divisors (see below), whose sum is σ = 22698344448. Its totient is φ = 21415287600.

The previous prime is 22051013197. The next prime is 22051013227. The reversal of 22051013221 is 12231015022.

It is a cyclic number.

It is not a de Polignac number, because 22051013221 - 2²¹ = 22048916069 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 (22051013227) 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, 1388890 + ... + 1404676.

It is an arithmetic number, because the mean of its divisors is an integer number (1418646528).

Almost surely, 2^22051013221 is an apocalyptic number.

It is an amenable number.

22051013221 is a deficient number, since it is larger than the sum of its proper divisors (647331227).

22051013221 is a wasteful number, since it uses less digits than its factorization.

22051013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16152.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 22051013221 its reverse (12231015022), we get a palindrome (34282028243).

The spelling of 22051013221 in words is "twenty-two billion, fifty-one million, thirteen thousand, two hundred twenty-one".