21101141 has 4 divisors (see below), whose sum is σ = 21136512. Its totient is φ = 21065772.

The previous prime is 21101123. The next prime is 21101207. The reversal of 21101141 is 14110112.

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 a de Polignac number, because none of the positive numbers 2^k-21101141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16775 + ... + 17988.

It is an arithmetic number, because the mean of its divisors is an integer number (5284128).

Almost surely, 2^21101141 is an apocalyptic number.

It is an amenable number.

21101141 is a deficient number, since it is larger than the sum of its proper divisors (35371).

21101141 is an equidigital number, since it uses as much as digits as its factorization.

21101141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35370.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 21101141 is about 4593.5978274115. The cubic root of 21101141 is about 276.3346296540.

Adding to 21101141 its reverse (14110112), we get a palindrome (35211253).

The spelling of 21101141 in words is "twenty-one million, one hundred one thousand, one hundred forty-one".