21321312203034 has 64 divisors (see below), whose sum is σ = 50046524436480. Its totient is φ = 6717892794480.

The previous prime is 21321312202997. The next prime is 21321312203057. The reversal of 21321312203034 is 43030221312312.

21321312203034 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 131 + 220 + 303 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21321312202989 and 21321312203007.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148029712 + ... + 148173675.

It is an arithmetic number, because the mean of its divisors is an integer number (781976944320).

Almost surely, 2^{21321312203034} is an apocalyptic number.

21321312203034 is an abundant number, since it is smaller than the sum of its proper divisors (28725212233446).

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

21321312203034 is a wasteful number, since it uses less digits than its factorization.

21321312203034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296203472 (or 296203466 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21321312203034 its reverse (43030221312312), we get a palindrome (64351533515346).

The spelling of 21321312203034 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twelve million, two hundred three thousand, thirty-four".