21141124453 has 4 divisors (see below), whose sum is σ = 21143808108. Its totient is φ = 21138440800.

The previous prime is 21141124423. The next prime is 21141124483. The reversal of 21141124453 is 35442114112.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (21141124423) and next prime (21141124483).

It can be written as a sum of positive squares in 2 ways, for example, as 16908581089 + 4232543364 = 130033^2 + 65058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21141124453 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 (21141124423) 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, 1329976 + ... + 1345777.

It is an arithmetic number, because the mean of its divisors is an integer number (5285952027).

Almost surely, 2^21141124453 is an apocalyptic number.

It is an amenable number.

21141124453 is a deficient number, since it is larger than the sum of its proper divisors (2683655).

21141124453 is an equidigital number, since it uses as much as digits as its factorization.

21141124453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683654.

The product of its digits is 3840, while the sum is 28.

Adding to 21141124453 its reverse (35442114112), we get a palindrome (56583238565).

The spelling of 21141124453 in words is "twenty-one billion, one hundred forty-one million, one hundred twenty-four thousand, four hundred fifty-three".