120203203331021 has 2 divisors, whose sum is σ = 120203203331022. Its totient is φ = 120203203331020.

The previous prime is 120203203330967. The next prime is 120203203331051. The reversal of 120203203331021 is 120133302302021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104587151889796 + 15616051441225 = 10226786^2 + 3951715^2 .

It is a cyclic number.

It is not a de Polignac number, because 120203203331021 - 2¹⁸ = 120203203068877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120203203331051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60101601665510 + 60101601665511.

It is an arithmetic number, because the mean of its divisors is an integer number (60101601665511).

Almost surely, 2^{120203203331021} is an apocalyptic number.

It is an amenable number.

120203203331021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120203203331021 is an equidigital number, since it uses as much as digits as its factorization.

120203203331021 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 23.

Adding to 120203203331021 its reverse (120133302302021), we get a palindrome (240336505633042).

The spelling of 120203203331021 in words is "one hundred twenty trillion, two hundred three billion, two hundred three million, three hundred thirty-one thousand, twenty-one".