21312001112204 has 24 divisors (see below), whose sum is σ = 42089531979600. Its totient is φ = 9353229327680.

The previous prime is 21312001112201. The next prime is 21312001112239. The reversal of 21312001112204 is 40221110021312.

It is not an unprimeable number, because it can be changed into a prime (21312001112201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8351096339 + ... + 8351098890.

It is an arithmetic number, because the mean of its divisors is an integer number (1753730499150).

Almost surely, 2^{21312001112204} is an apocalyptic number.

It is an amenable number.

21312001112204 is a deficient number, since it is larger than the sum of its proper divisors (20777530867396).

21312001112204 is a wasteful number, since it uses less digits than its factorization.

21312001112204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16702195273 (or 16702195271 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21312001112204 its reverse (40221110021312), we get a palindrome (61533111133516).

The spelling of 21312001112204 in words is "twenty-one trillion, three hundred twelve billion, one million, one hundred twelve thousand, two hundred four".