21320331032133 has 32 divisors (see below), whose sum is σ = 36098360689920. Its totient is φ = 12182895875520.

The previous prime is 21320331032131. The next prime is 21320331032137. The reversal of 21320331032133 is 33123013302312.

21320331032133 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 0 + 331 + 0 + 321 + 3 + 3 = 666.

It is not a de Polignac number, because 21320331032133 - 2¹ = 21320331032131 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21320331032097 and 21320331032106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320331032131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15665191 + ... + 16971707.

It is an arithmetic number, because the mean of its divisors is an integer number (1128073771560).

Almost surely, 2^{21320331032133} is an apocalyptic number.

It is an amenable number.

21320331032133 is a deficient number, since it is larger than the sum of its proper divisors (14778029657787).

21320331032133 is a wasteful number, since it uses less digits than its factorization.

21320331032133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392874 (or 1392868 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 21320331032133 its reverse (33123013302312), we get a palindrome (54443344334445).

The spelling of 21320331032133 in words is "twenty-one trillion, three hundred twenty billion, three hundred thirty-one million, thirty-two thousand, one hundred thirty-three".