21251053301 has 8 divisors (see below), whose sum is σ = 21340898208. Its totient is φ = 21161250000.

The previous prime is 21251053279. The next prime is 21251053333. The reversal of 21251053301 is 10335015212.

It is a happy number.

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 21251053301 - 2²⁶ = 21183944437 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 (21251053361) 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, 1423526 + ... + 1438376.

It is an arithmetic number, because the mean of its divisors is an integer number (2667612276).

Almost surely, 2^21251053301 is an apocalyptic number.

It is an amenable number.

21251053301 is a deficient number, since it is larger than the sum of its proper divisors (89844907).

21251053301 is a wasteful number, since it uses less digits than its factorization.

21251053301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20803.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 21251053301 its reverse (10335015212), we get a palindrome (31586068513).

The spelling of 21251053301 in words is "twenty-one billion, two hundred fifty-one million, fifty-three thousand, three hundred one".