20132100221 has 2 divisors, whose sum is σ = 20132100222. Its totient is φ = 20132100220.

The previous prime is 20132100193. The next prime is 20132100293. The reversal of 20132100221 is 12200123102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16851674596 + 3280425625 = 129814^2 + 57275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20132100221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20132100196 and 20132100205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20132120221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066050110 + 10066050111.

It is an arithmetic number, because the mean of its divisors is an integer number (10066050111).

Almost surely, 2^20132100221 is an apocalyptic number.

It is an amenable number.

20132100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132100221 is an equidigital number, since it uses as much as digits as its factorization.

20132100221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20132100221 its reverse (12200123102), we get a palindrome (32332223323).

The spelling of 20132100221 in words is "twenty billion, one hundred thirty-two million, one hundred thousand, two hundred twenty-one".