2101021331 has 2 divisors, whose sum is σ = 2101021332. Its totient is φ = 2101021330.

The previous prime is 2101021289. The next prime is 2101021339. The reversal of 2101021331 is 1331201012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101021331 is a prime.

It is a super-2 number, since 2×2101021331² = 8828581266634023122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101021339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050510665 + 1050510666.

It is an arithmetic number, because the mean of its divisors is an integer number (1050510666).

Almost surely, 2^2101021331 is an apocalyptic number.

2101021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101021331 is an equidigital number, since it uses as much as digits as its factorization.

2101021331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2101021331 is about 45836.8992297690. The cubic root of 2101021331 is about 1280.7867337535.

Adding to 2101021331 its reverse (1331201012), we get a palindrome (3432222343).

The spelling of 2101021331 in words is "two billion, one hundred one million, twenty-one thousand, three hundred thirty-one".