21203002112231 has 24 divisors (see below), whose sum is σ = 21986859479760. Its totient is φ = 20442275732736.

The previous prime is 21203002112147. The next prime is 21203002112249. The reversal of 21203002112231 is 13221120030212.

It is not a de Polignac number, because 21203002112231 - 2³⁰ = 21201928370407 is a prime.

It is a super-2 number, since 2×21203002112231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203002112531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76837301 + ... + 77112753.

It is an arithmetic number, because the mean of its divisors is an integer number (916119144990).

Almost surely, 2^{21203002112231} is an apocalyptic number.

21203002112231 is a deficient number, since it is larger than the sum of its proper divisors (783857367529).

21203002112231 is an equidigital number, since it uses as much as digits as its factorization.

21203002112231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276035 (or 275982 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21203002112231 its reverse (13221120030212), we get a palindrome (34424122142443).

The spelling of 21203002112231 in words is "twenty-one trillion, two hundred three billion, two million, one hundred twelve thousand, two hundred thirty-one".