2113447621 has 4 divisors (see below), whose sum is σ = 2205336672. Its totient is φ = 2021558572.

The previous prime is 2113447613. The next prime is 2113447631. The reversal of 2113447621 is 1267443112.

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 2113447621 - 2³ = 2113447613 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 (2113447631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45944491 + ... + 45944536.

It is an arithmetic number, because the mean of its divisors is an integer number (551334168).

Almost surely, 2^2113447621 is an apocalyptic number.

It is an amenable number.

2113447621 is a deficient number, since it is larger than the sum of its proper divisors (91889051).

2113447621 is an equidigital number, since it uses as much as digits as its factorization.

2113447621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91889050.

The product of its digits is 8064, while the sum is 31.

The square root of 2113447621 is about 45972.2483787774. The cubic root of 2113447621 is about 1283.3068023000.

The spelling of 2113447621 in words is "two billion, one hundred thirteen million, four hundred forty-seven thousand, six hundred twenty-one".