20123330333021 has 2 divisors, whose sum is σ = 20123330333022. Its totient is φ = 20123330333020.

The previous prime is 20123330333011. The next prime is 20123330333023. The reversal of 20123330333021 is 12033303332102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16864081428100 + 3259248904921 = 4106590^2 + 1805339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123330333021 is a prime.

Together with 20123330333023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123330333023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061665166510 + 10061665166511.

It is an arithmetic number, because the mean of its divisors is an integer number (10061665166511).

Almost surely, 2^{20123330333021} is an apocalyptic number.

It is an amenable number.

20123330333021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123330333021 is an equidigital number, since it uses as much as digits as its factorization.

20123330333021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 20123330333021 its reverse (12033303332102), we get a palindrome (32156633665123).

The spelling of 20123330333021 in words is "twenty trillion, one hundred twenty-three billion, three hundred thirty million, three hundred thirty-three thousand, twenty-one".