2113110403021 has 2 divisors, whose sum is σ = 2113110403022. Its totient is φ = 2113110403020.

The previous prime is 2113110403003. The next prime is 2113110403037. The reversal of 2113110403021 is 1203040113112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1216322236900 + 896788166121 = 1102870^2 + 946989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113110403021 - 2³⁹ = 1563354589133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113110403021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113110403081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056555201510 + 1056555201511.

It is an arithmetic number, because the mean of its divisors is an integer number (1056555201511).

Almost surely, 2^{2113110403021} is an apocalyptic number.

It is an amenable number.

2113110403021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113110403021 is an equidigital number, since it uses as much as digits as its factorization.

2113110403021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2113110403021 its reverse (1203040113112), we get a palindrome (3316150516133).

The spelling of 2113110403021 in words is "two trillion, one hundred thirteen billion, one hundred ten million, four hundred three thousand, twenty-one".