20200232221 has 16 divisors (see below), whose sum is σ = 22360783536. Its totient is φ = 18132581376.

The previous prime is 20200232123. The next prime is 20200232267. The reversal of 20200232221 is 12223200202.

It can be written as a sum of positive squares in 8 ways, for example, as 1014104025 + 19186128196 = 31845^2 + 138514^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20200232221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20200232195 and 20200232204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200272221) 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, 51870 + ... + 207583.

It is an arithmetic number, because the mean of its divisors is an integer number (1397548971).

Almost surely, 2^20200232221 is an apocalyptic number.

It is an amenable number.

20200232221 is a deficient number, since it is larger than the sum of its proper divisors (2160551315).

20200232221 is a wasteful number, since it uses less digits than its factorization.

20200232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259632.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20200232221 its reverse (12223200202), we get a palindrome (32423432423).

The spelling of 20200232221 in words is "twenty billion, two hundred million, two hundred thirty-two thousand, two hundred twenty-one".