21230201243 has 8 divisors (see below), whose sum is σ = 21577739040. Its totient is φ = 20885085760.

The previous prime is 21230201233. The next prime is 21230201261. The reversal of 21230201243 is 34210203212.

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 21230201243 - 2²⁴ = 21213424027 is a prime.

It is a super-3 number, since 3×21230201243³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230201203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587903 + ... + 622968.

It is an arithmetic number, because the mean of its divisors is an integer number (2697217380).

Almost surely, 2^21230201243 is an apocalyptic number.

21230201243 is a deficient number, since it is larger than the sum of its proper divisors (347537797).

21230201243 is a wasteful number, since it uses less digits than its factorization.

21230201243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211157.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21230201243 its reverse (34210203212), we get a palindrome (55440404455).

The spelling of 21230201243 in words is "twenty-one billion, two hundred thirty million, two hundred one thousand, two hundred forty-three".