21110034401 has 4 divisors (see below), whose sum is σ = 21132326832. Its totient is φ = 21087741972.

The previous prime is 21110034377. The next prime is 21110034457. The reversal of 21110034401 is 10443001112.

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 21110034401 - 2²² = 21105840097 is a prime.

It is a super-2 number, since 2×21110034401² (a number of 21 digits) 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 21110034401.

It is not an unprimeable number, because it can be changed into a prime (21110036401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11144795 + ... + 11146688.

It is an arithmetic number, because the mean of its divisors is an integer number (5283081708).

Almost surely, 2^21110034401 is an apocalyptic number.

It is an amenable number.

21110034401 is a deficient number, since it is larger than the sum of its proper divisors (22292431).

21110034401 is an equidigital number, since it uses as much as digits as its factorization.

21110034401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22292430.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21110034401 its reverse (10443001112), we get a palindrome (31553035513).

The spelling of 21110034401 in words is "twenty-one billion, one hundred ten million, thirty-four thousand, four hundred one".