21233201131 has 2 divisors, whose sum is σ = 21233201132. Its totient is φ = 21233201130.

The previous prime is 21233201123. The next prime is 21233201147. The reversal of 21233201131 is 13110233212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21233201131 - 2³ = 21233201123 is a prime.

It is a super-2 number, since 2×21233201131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21233201099 and 21233201108.

It is not a weakly prime, because it can be changed into another prime (21233261131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616600565 + 10616600566.

It is an arithmetic number, because the mean of its divisors is an integer number (10616600566).

Almost surely, 2^21233201131 is an apocalyptic number.

21233201131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233201131 is an equidigital number, since it uses as much as digits as its factorization.

21233201131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21233201131 its reverse (13110233212), we get a palindrome (34343434343).

The spelling of 21233201131 in words is "twenty-one billion, two hundred thirty-three million, two hundred one thousand, one hundred thirty-one".