21311133030231 has 128 divisors (see below), whose sum is σ = 33245006266368. Its totient is φ = 12023743680000.

The previous prime is 21311133030223. The next prime is 21311133030263. The reversal of 21311133030231 is 13203033111312.

It is not a de Polignac number, because 21311133030231 - 2³ = 21311133030223 is a prime.

It is a super-2 number, since 2×21311133030231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311133030211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 564021366 + ... + 564059148.

It is an arithmetic number, because the mean of its divisors is an integer number (259726611456).

Almost surely, 2^{21311133030231} is an apocalyptic number.

21311133030231 is a deficient number, since it is larger than the sum of its proper divisors (11933873236137).

21311133030231 is a wasteful number, since it uses less digits than its factorization.

21311133030231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38085.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21311133030231 its reverse (13203033111312), we get a palindrome (34514166141543).

The spelling of 21311133030231 in words is "twenty-one trillion, three hundred eleven billion, one hundred thirty-three million, thirty thousand, two hundred thirty-one".