21131210223133 has 8 divisors (see below), whose sum is σ = 22051932265728. Its totient is φ = 20210652661584.

The previous prime is 21131210223091. The next prime is 21131210223191. The reversal of 21131210223133 is 33132201213112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21131210223133 - 2³³ = 21122620288541 is a prime.

It is a super-2 number, since 2×21131210223133² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21131210223098 and 21131210223107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131210229133) 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, 40857685 + ... + 41371642.

It is an arithmetic number, because the mean of its divisors is an integer number (2756491533216).

Almost surely, 2^{21131210223133} is an apocalyptic number.

21131210223133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21131210223133 is a deficient number, since it is larger than the sum of its proper divisors (920722042595).

21131210223133 is a wasteful number, since it uses less digits than its factorization.

21131210223133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82240523.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21131210223133 its reverse (33132201213112), we get a palindrome (54263411436245).

The spelling of 21131210223133 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred ten million, two hundred twenty-three thousand, one hundred thirty-three".