2113001521 has 4 divisors (see below), whose sum is σ = 2114135152. Its totient is φ = 2111867892.

The previous prime is 2113001491. The next prime is 2113001531. The reversal of 2113001521 is 1251003112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2113001521 - 2²⁹ = 1576130609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2113001495 and 2113001504.

It is not an unprimeable number, because it can be changed into a prime (2113001531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564015 + ... + 567748.

It is an arithmetic number, because the mean of its divisors is an integer number (528533788).

Almost surely, 2^2113001521 is an apocalyptic number.

It is an amenable number.

2113001521 is a deficient number, since it is larger than the sum of its proper divisors (1133631).

2113001521 is a wasteful number, since it uses less digits than its factorization.

2113001521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133630.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2113001521 is about 45967.3962825827. The cubic root of 2113001521 is about 1283.2165038003.

Adding to 2113001521 its reverse (1251003112), we get a palindrome (3364004633).

The spelling of 2113001521 in words is "two billion, one hundred thirteen million, one thousand, five hundred twenty-one".