20301202121 has 2 divisors, whose sum is σ = 20301202122. Its totient is φ = 20301202120.

The previous prime is 20301202091. The next prime is 20301202169. The reversal of 20301202121 is 12120210302.

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., 16987472896 + 3313729225 = 130336^2 + 57565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20301202121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20301202096 and 20301202105.

It is not a weakly prime, because it can be changed into another prime (20301202421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10150601060 + 10150601061.

It is an arithmetic number, because the mean of its divisors is an integer number (10150601061).

Almost surely, 2^20301202121 is an apocalyptic number.

It is an amenable number.

20301202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20301202121 is an equidigital number, since it uses as much as digits as its factorization.

20301202121 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 20301202121 its reverse (12120210302), we get a palindrome (32421412423).

The spelling of 20301202121 in words is "twenty billion, three hundred one million, two hundred two thousand, one hundred twenty-one".