2101333320421 has 2 divisors, whose sum is σ = 2101333320422. Its totient is φ = 2101333320420.

The previous prime is 2101333320349. The next prime is 2101333320433. The reversal of 2101333320421 is 1240233331012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2070968515396 + 30364805025 = 1439086^2 + 174255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101333320421 - 2²³ = 2101324931813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101333320491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050666660210 + 1050666660211.

It is an arithmetic number, because the mean of its divisors is an integer number (1050666660211).

Almost surely, 2^{2101333320421} is an apocalyptic number.

It is an amenable number.

2101333320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101333320421 is an equidigital number, since it uses as much as digits as its factorization.

2101333320421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 2101333320421 its reverse (1240233331012), we get a palindrome (3341566651433).

The spelling of 2101333320421 in words is "two trillion, one hundred one billion, three hundred thirty-three million, three hundred twenty thousand, four hundred twenty-one".