2113435621 has 8 divisors (see below), whose sum is σ = 2307700224. Its totient is φ = 1919526720.

The previous prime is 2113435619. The next prime is 2113435673. The reversal of 2113435621 is 1265343112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2113435621 - 2¹ = 2113435619 is a prime.

It is a super-2 number, since 2×2113435621² = 8933220248223311282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2113435621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113435421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76420 + ... + 100333.

It is an arithmetic number, because the mean of its divisors is an integer number (288462528).

Almost surely, 2^2113435621 is an apocalyptic number.

It is an amenable number.

2113435621 is a deficient number, since it is larger than the sum of its proper divisors (194264603).

2113435621 is a wasteful number, since it uses less digits than its factorization.

2113435621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177851.

The product of its digits is 4320, while the sum is 28.

The square root of 2113435621 is about 45972.1178650712. The cubic root of 2113435621 is about 1283.3043734549.

Adding to 2113435621 its reverse (1265343112), we get a palindrome (3378778733).

It can be divided in two parts, 2113 and 435621, that added together give a palindrome (437734).

The spelling of 2113435621 in words is "two billion, one hundred thirteen million, four hundred thirty-five thousand, six hundred twenty-one".