20311330332121 has 2 divisors, whose sum is σ = 20311330332122. Its totient is φ = 20311330332120.

The previous prime is 20311330332107. The next prime is 20311330332131. The reversal of 20311330332121 is 12123303311302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19809798672400 + 501531659721 = 4450820^2 + 708189^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311330332121 - 2¹³ = 20311330323929 is a prime.

It is not a weakly prime, because it can be changed into another prime (20311330332131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155665166060 + 10155665166061.

It is an arithmetic number, because the mean of its divisors is an integer number (10155665166061).

Almost surely, 2^{20311330332121} is an apocalyptic number.

It is an amenable number.

20311330332121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311330332121 is an equidigital number, since it uses as much as digits as its factorization.

20311330332121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20311330332121 its reverse (12123303311302), we get a palindrome (32434633643423).

The spelling of 20311330332121 in words is "twenty trillion, three hundred eleven billion, three hundred thirty million, three hundred thirty-two thousand, one hundred twenty-one".