21203031211232 has 24 divisors (see below), whose sum is σ = 44954503674696. Its totient is φ = 9786014404992.

The previous prime is 21203031211177. The next prime is 21203031211247. The reversal of 21203031211232 is 23211213030212.

It is a junction number, because it is equal to n+sod(n) for n = 21203031211198 and 21203031211207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25484412098 + ... + 25484412929.

It is an arithmetic number, because the mean of its divisors is an integer number (1873104319779).

Almost surely, 2^{21203031211232} is an apocalyptic number.

It is an amenable number.

21203031211232 is an abundant number, since it is smaller than the sum of its proper divisors (23751472463464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21203031211232 is a wasteful number, since it uses less digits than its factorization.

21203031211232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50968825050 (or 50968825042 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21203031211232 its reverse (23211213030212), we get a palindrome (44414244241444).

The spelling of 21203031211232 in words is "twenty-one trillion, two hundred three billion, thirty-one million, two hundred eleven thousand, two hundred thirty-two".