2113333433621 has 2 divisors, whose sum is σ = 2113333433622. Its totient is φ = 2113333433620.

The previous prime is 2113333433609. The next prime is 2113333433699. The reversal of 2113333433621 is 1263343333112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1469465206225 + 643868227396 = 1212215^2 + 802414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113333433621 is a prime.

It is a super-2 number, since 2×2113333433621² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113333433921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056666716810 + 1056666716811.

It is an arithmetic number, because the mean of its divisors is an integer number (1056666716811).

Almost surely, 2^{2113333433621} is an apocalyptic number.

It is an amenable number.

2113333433621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113333433621 is an equidigital number, since it uses as much as digits as its factorization.

2113333433621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 35.

Adding to 2113333433621 its reverse (1263343333112), we get a palindrome (3376676766733).

The spelling of 2113333433621 in words is "two trillion, one hundred thirteen billion, three hundred thirty-three million, four hundred thirty-three thousand, six hundred twenty-one".