2101320121331 has 2 divisors, whose sum is σ = 2101320121332. Its totient is φ = 2101320121330.

The previous prime is 2101320121309. The next prime is 2101320121379. The reversal of 2101320121331 is 1331210231012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101320121331 - 2¹⁸ = 2101319859187 is a prime.

It is a super-2 number, since 2×2101320121331² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101320121531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050660060665 + 1050660060666.

It is an arithmetic number, because the mean of its divisors is an integer number (1050660060666).

Almost surely, 2^{2101320121331} is an apocalyptic number.

2101320121331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101320121331 is an equidigital number, since it uses as much as digits as its factorization.

2101320121331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2101320121331 its reverse (1331210231012), we get a palindrome (3432530352343).

The spelling of 2101320121331 in words is "two trillion, one hundred one billion, three hundred twenty million, one hundred twenty-one thousand, three hundred thirty-one".