21121303053 has 8 divisors (see below), whose sum is σ = 28848609216. Its totient is φ = 13737432800.

The previous prime is 21121303037. The next prime is 21121303097. The reversal of 21121303053 is 35030312112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21121303053 - 2⁴ = 21121303037 is a prime.

It is a super-2 number, since 2×21121303053² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121313053) 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 7 ways as a sum of consecutive naturals, for example, 85858833 + ... + 85859078.

It is an arithmetic number, because the mean of its divisors is an integer number (3606076152).

Almost surely, 2^21121303053 is an apocalyptic number.

It is an amenable number.

21121303053 is a deficient number, since it is larger than the sum of its proper divisors (7727306163).

21121303053 is a wasteful number, since it uses less digits than its factorization.

21121303053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171717955.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21121303053 its reverse (35030312112), we get a palindrome (56151615165).

The spelling of 21121303053 in words is "twenty-one billion, one hundred twenty-one million, three hundred three thousand, fifty-three".