21203200241231 has 4 divisors (see below), whose sum is σ = 21263954397000. Its totient is φ = 21142446085464.

The previous prime is 21203200241183. The next prime is 21203200241287. The reversal of 21203200241231 is 13214200230212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21203200241231 is a prime.

It is a super-2 number, since 2×21203200241231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21203200241197 and 21203200241206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203200241291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30377077361 + ... + 30377078058.

It is an arithmetic number, because the mean of its divisors is an integer number (5315988599250).

Almost surely, 2^{21203200241231} is an apocalyptic number.

21203200241231 is a deficient number, since it is larger than the sum of its proper divisors (60754155769).

21203200241231 is an equidigital number, since it uses as much as digits as its factorization.

21203200241231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60754155768.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21203200241231 its reverse (13214200230212), we get a palindrome (34417400471443).

The spelling of 21203200241231 in words is "twenty-one trillion, two hundred three billion, two hundred million, two hundred forty-one thousand, two hundred thirty-one".