2126401111 has 4 divisors (see below), whose sum is σ = 2126916792. Its totient is φ = 2125885432.

The previous prime is 2126401099. The next prime is 2126401139. The reversal of 2126401111 is 1111046212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2126401111 - 2²¹ = 2124303959 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 (2126401141) 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, 251605 + ... + 259918.

It is an arithmetic number, because the mean of its divisors is an integer number (531729198).

Almost surely, 2^2126401111 is an apocalyptic number.

2126401111 is a deficient number, since it is larger than the sum of its proper divisors (515681).

2126401111 is an equidigital number, since it uses as much as digits as its factorization.

2126401111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515680.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 2126401111 is about 46112.9169647725. The cubic root of 2126401111 is about 1285.9232941066.

Adding to 2126401111 its reverse (1111046212), we get a palindrome (3237447323).

The spelling of 2126401111 in words is "two billion, one hundred twenty-six million, four hundred one thousand, one hundred eleven".