21312132331203 has 96 divisors (see below), whose sum is σ = 37724731617600. Its totient is φ = 11848060159488.

The previous prime is 21312132331159. The next prime is 21312132331219. The reversal of 21312132331203 is 30213323121312.

21312132331203 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 21 + 323 + 312 + 0 + 3 = 666.

It is not a de Polignac number, because 21312132331203 - 2¹⁷ = 21312132200131 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (21312132333203) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 844734793 + ... + 844760021.

It is an arithmetic number, because the mean of its divisors is an integer number (392965954350).

Almost surely, 2^{21312132331203} is an apocalyptic number.

21312132331203 is a deficient number, since it is larger than the sum of its proper divisors (16412599286397).

21312132331203 is a wasteful number, since it uses less digits than its factorization.

21312132331203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42546 (or 42533 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21312132331203 its reverse (30213323121312), we get a palindrome (51525455452515).

The spelling of 21312132331203 in words is "twenty-one trillion, three hundred twelve billion, one hundred thirty-two million, three hundred thirty-one thousand, two hundred three".