20321321011129 has 2 divisors, whose sum is σ = 20321321011130. Its totient is φ = 20321321011128.

The previous prime is 20321321011031. The next prime is 20321321011157. The reversal of 20321321011129 is 92111012312302.

It is an a-pointer prime, because the next prime (20321321011157) can be obtained adding 20321321011129 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17910670410000 + 2410650601129 = 4232100^2 + 1552627^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321321011129 - 2²¹ = 20321318913977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20321321011097 and 20321321011106.

It is not a weakly prime, because it can be changed into another prime (20321321011169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160660505564 + 10160660505565.

It is an arithmetic number, because the mean of its divisors is an integer number (10160660505565).

Almost surely, 2^{20321321011129} is an apocalyptic number.

It is an amenable number.

20321321011129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321321011129 is an equidigital number, since it uses as much as digits as its factorization.

20321321011129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 20321321011129 in words is "twenty trillion, three hundred twenty-one billion, three hundred twenty-one million, eleven thousand, one hundred twenty-nine".