2121170413 has 4 divisors (see below), whose sum is σ = 2121460480. Its totient is φ = 2120880348.

The previous prime is 2121170371. The next prime is 2121170449. The reversal of 2121170413 is 3140711212.

It is a happy number.

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 2121170413 - 2⁹ = 2121169901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121170453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133773 + ... + 148786.

It is an arithmetic number, because the mean of its divisors is an integer number (530365120).

Almost surely, 2^2121170413 is an apocalyptic number.

It is an amenable number.

2121170413 is a deficient number, since it is larger than the sum of its proper divisors (290067).

2121170413 is an equidigital number, since it uses as much as digits as its factorization.

2121170413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290066.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 2121170413 is about 46056.1658521419. The cubic root of 2121170413 is about 1284.8680213891.

Adding to 2121170413 its reverse (3140711212), we get a palindrome (5261881625).

The spelling of 2121170413 in words is "two billion, one hundred twenty-one million, one hundred seventy thousand, four hundred thirteen".