20000120121239 has 2 divisors, whose sum is σ = 20000120121240. Its totient is φ = 20000120121238.

The previous prime is 20000120121133. The next prime is 20000120121263. The reversal of 20000120121239 is 93212102100002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000120121239 is a prime.

It is a super-2 number, since 2×20000120121239² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000120111239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000060060619 + 10000060060620.

It is an arithmetic number, because the mean of its divisors is an integer number (10000060060620).

Almost surely, 2^{20000120121239} is an apocalyptic number.

20000120121239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000120121239 is an equidigital number, since it uses as much as digits as its factorization.

20000120121239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 20000120121239 in words is "twenty trillion, one hundred twenty million, one hundred twenty-one thousand, two hundred thirty-nine".