21040251301 has 8 divisors (see below), whose sum is σ = 21558265344. Its totient is φ = 20522467680.

The previous prime is 21040251289. The next prime is 21040251329. The reversal of 21040251301 is 10315204012.

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 21040251301 - 2⁷ = 21040251173 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 (21040251101) 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, 135100 + ... + 245626.

It is an arithmetic number, because the mean of its divisors is an integer number (2694783168).

Almost surely, 2^21040251301 is an apocalyptic number.

It is an amenable number.

21040251301 is a deficient number, since it is larger than the sum of its proper divisors (518014043).

21040251301 is a wasteful number, since it uses less digits than its factorization.

21040251301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115211.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 21040251301 its reverse (10315204012), we get a palindrome (31355455313).

The spelling of 21040251301 in words is "twenty-one billion, forty million, two hundred fifty-one thousand, three hundred one".