21253240034601 has 32 divisors (see below), whose sum is σ = 29389935697920. Its totient is φ = 13651412611200.

The previous prime is 21253240034561. The next prime is 21253240034633. The reversal of 21253240034601 is 10643004235212.

It is not a de Polignac number, because 21253240034601 - 2⁷ = 21253240034473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21253240034671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26049780 + ... + 26853258.

It is an arithmetic number, because the mean of its divisors is an integer number (918435490560).

Almost surely, 2^{21253240034601} is an apocalyptic number.

It is an amenable number.

21253240034601 is a deficient number, since it is larger than the sum of its proper divisors (8136695663319).

21253240034601 is a wasteful number, since it uses less digits than its factorization.

21253240034601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806197.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 21253240034601 its reverse (10643004235212), we get a palindrome (31896244269813).

The spelling of 21253240034601 in words is "twenty-one trillion, two hundred fifty-three billion, two hundred forty million, thirty-four thousand, six hundred one".