2113101040021 has 2 divisors, whose sum is σ = 2113101040022. Its totient is φ = 2113101040020.

The previous prime is 2113101039977. The next prime is 2113101040027. The reversal of 2113101040021 is 1200401013112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1591760722500 + 521340317521 = 1261650^2 + 722039^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113101040021 - 2⁹ = 2113101039509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2113101039977 and 2113101040004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113101040027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056550520010 + 1056550520011.

It is an arithmetic number, because the mean of its divisors is an integer number (1056550520011).

Almost surely, 2^{2113101040021} is an apocalyptic number.

It is an amenable number.

2113101040021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113101040021 is an equidigital number, since it uses as much as digits as its factorization.

2113101040021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2113101040021 its reverse (1200401013112), we get a palindrome (3313502053133).

The spelling of 2113101040021 in words is "two trillion, one hundred thirteen billion, one hundred one million, forty thousand, twenty-one".