20224022221 has 16 divisors (see below), whose sum is σ = 21854106288. Its totient is φ = 18604684800.

The previous prime is 20224022201. The next prime is 20224022251. The reversal of 20224022221 is 12222042202.

It can be written as a sum of positive squares in 8 ways, for example, as 9069705225 + 11154316996 = 95235^2 + 105614^2 .

It is not a de Polignac number, because 20224022221 - 2⁹ = 20224021709 is a prime.

It is a super-2 number, since 2×20224022221² (a number of 21 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 (20224022201) 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, 5558815 + ... + 5562451.

It is an arithmetic number, because the mean of its divisors is an integer number (1365881643).

Almost surely, 2^20224022221 is an apocalyptic number.

It is an amenable number.

20224022221 is a deficient number, since it is larger than the sum of its proper divisors (1630084067).

20224022221 is a wasteful number, since it uses less digits than its factorization.

20224022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4992.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 20224022221 its reverse (12222042202), we get a palindrome (32446064423).

The spelling of 20224022221 in words is "twenty billion, two hundred twenty-four million, twenty-two thousand, two hundred twenty-one".