21041212505053 has 8 divisors (see below), whose sum is σ = 22680613480448. Its totient is φ = 19404789553584.

The previous prime is 21041212505011. The next prime is 21041212505057. The reversal of 21041212505053 is 35050521214012.

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 21041212505053 - 2¹³ = 21041212496861 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 (21041212505057) 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, 744491301 + ... + 744519562.

It is an arithmetic number, because the mean of its divisors is an integer number (2835076685056).

Almost surely, 2^{21041212505053} is an apocalyptic number.

It is an amenable number.

21041212505053 is a deficient number, since it is larger than the sum of its proper divisors (1639400975395).

21041212505053 is a wasteful number, since it uses less digits than its factorization.

21041212505053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489011963.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 21041212505053 its reverse (35050521214012), we get a palindrome (56091733719065).

The spelling of 21041212505053 in words is "twenty-one trillion, forty-one billion, two hundred twelve million, five hundred five thousand, fifty-three".