21243000241001 has 16 divisors (see below), whose sum is σ = 26619220045440. Its totient is φ = 16468961873280.

The previous prime is 21243000240989. The next prime is 21243000241019. The reversal of 21243000241001 is 10014200034212.

It is not a de Polignac number, because 21243000241001 - 2²² = 21242996046697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21243000241081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700195796 + ... + 700226133.

It is an arithmetic number, because the mean of its divisors is an integer number (1663701252840).

Almost surely, 2^{21243000241001} is an apocalyptic number.

It is an amenable number.

21243000241001 is a deficient number, since it is larger than the sum of its proper divisors (5376219804439).

21243000241001 is a wasteful number, since it uses less digits than its factorization.

21243000241001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400422144.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21243000241001 its reverse (10014200034212), we get a palindrome (31257200275213).

The spelling of 21243000241001 in words is "twenty-one trillion, two hundred forty-three billion, two hundred forty-one thousand, one".