21253512153301 has 48 divisors (see below), whose sum is σ = 22990504513536. Its totient is φ = 19579271145984.

The previous prime is 21253512153277. The next prime is 21253512153343. The reversal of 21253512153301 is 10335121535212.

It is not a de Polignac number, because 21253512153301 - 2²³ = 21253503764693 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 (21253512153001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13563185020 + ... + 13563186586.

It is an arithmetic number, because the mean of its divisors is an integer number (478968844032).

Almost surely, 2^{21253512153301} is an apocalyptic number.

It is an amenable number.

21253512153301 is a deficient number, since it is larger than the sum of its proper divisors (1736992360235).

21253512153301 is a wasteful number, since it uses less digits than its factorization.

21253512153301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738 (or 2671 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

Adding to 21253512153301 its reverse (10335121535212), we get a palindrome (31588633688513).

The spelling of 21253512153301 in words is "twenty-one trillion, two hundred fifty-three billion, five hundred twelve million, one hundred fifty-three thousand, three hundred one".