20132225021 has 2 divisors, whose sum is σ = 20132225022.
Its totient is φ = 20132225020.
The previous prime is 20132224961. The next prime is 20132225051. The reversal of 20132225021 is 12052223102.
Adding to 20132225021 its reverse (12052223102), we get a palindrome (32184448123).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 19530062500 + 602162521 = 139750^2 + 24539^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-20132225021 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 20132224984 and 20132225002.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (20132225051) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10066112510 + 10066112511.
It is an arithmetic number, because the mean of its divisors is an integer number (10066112511).
Almost surely, 220132225021 is an apocalyptic number.
It is an amenable number.
20132225021 is a deficient number, since it is larger than the sum of its proper divisors (1).
20132225021 is an equidigital number, since it uses as much as digits as its factorization.
20132225021 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 480, while the sum is 20.
The spelling of 20132225021 in words is "twenty billion, one hundred thirty-two million, two hundred twenty-five thousand, twenty-one".