2113421751 has 24 divisors (see below), whose sum is σ = 3490200480. Its totient is φ = 1207192896.

The previous prime is 2113421731. The next prime is 2113421753. The reversal of 2113421751 is 1571243112.

It is not a de Polignac number, because 2113421751 - 2¹⁷ = 2113290679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113421753) 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 23 ways as a sum of consecutive naturals, for example, 210105 + ... + 219933.

It is an arithmetic number, because the mean of its divisors is an integer number (145425020).

Almost surely, 2^2113421751 is an apocalyptic number.

2113421751 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2113421751 is a deficient number, since it is larger than the sum of its proper divisors (1376778729).

2113421751 is a wasteful number, since it uses less digits than its factorization.

2113421751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13255 (or 13252 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 2113421751 is about 45971.9670125175. The cubic root of 2113421751 is about 1283.3015661033.

Adding to 2113421751 its reverse (1571243112), we get a palindrome (3684664863).

The spelling of 2113421751 in words is "two billion, one hundred thirteen million, four hundred twenty-one thousand, seven hundred fifty-one".