21131033313033 has 36 divisors (see below), whose sum is σ = 35785459906560. Its totient is φ = 11979798381936.

The previous prime is 21131033313029. The next prime is 21131033313073. The reversal of 21131033313033 is 33031333013112.

21131033313033 is a `hidden beast` number, since 2 + 1 + 1 + 310 + 3 + 3 + 313 + 0 + 33 = 666.

It is not a de Polignac number, because 21131033313033 - 2² = 21131033313029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21131033312988 and 21131033313006.

It is not an unprimeable number, because it can be changed into a prime (21131033313073) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 188590353 + ... + 188702366.

It is an arithmetic number, because the mean of its divisors is an integer number (994040552960).

Almost surely, 2^{21131033313033} is an apocalyptic number.

It is an amenable number.

21131033313033 is a deficient number, since it is larger than the sum of its proper divisors (14654426593527).

21131033313033 is a wasteful number, since it uses less digits than its factorization.

21131033313033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377292866 (or 377292856 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 27.

Adding to 21131033313033 its reverse (33031333013112), we get a palindrome (54162366326145).

The spelling of 21131033313033 in words is "twenty-one trillion, one hundred thirty-one billion, thirty-three million, three hundred thirteen thousand, thirty-three".