21301127452 has 24 divisors (see below), whose sum is σ = 41068428912. Its totient is φ = 9586464000.

The previous prime is 21301127443. The next prime is 21301127453. The reversal of 21301127452 is 25472110312.

It is a self number, because there is not a number n which added to its sum of digits gives 21301127452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301127453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2392173 + ... + 2401060.

It is an arithmetic number, because the mean of its divisors is an integer number (1711184538).

Almost surely, 2^21301127452 is an apocalyptic number.

21301127452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21301127452 is a deficient number, since it is larger than the sum of its proper divisors (19767301460).

21301127452 is a wasteful number, since it uses less digits than its factorization.

21301127452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793349 (or 4793347 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 21301127452 its reverse (25472110312), we get a palindrome (46773237764).

The spelling of 21301127452 in words is "twenty-one billion, three hundred one million, one hundred twenty-seven thousand, four hundred fifty-two".