21202231131527 has 2 divisors, whose sum is σ = 21202231131528. Its totient is φ = 21202231131526.

The previous prime is 21202231131449. The next prime is 21202231131547. The reversal of 21202231131527 is 72513113220212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202231131527 - 2²⁴ = 21202214354311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21202231131493 and 21202231131502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202231131547) 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 as a sum of consecutive naturals, namely, 10601115565763 + 10601115565764.

It is an arithmetic number, because the mean of its divisors is an integer number (10601115565764).

Almost surely, 2^{21202231131527} is an apocalyptic number.

21202231131527 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202231131527 is an equidigital number, since it uses as much as digits as its factorization.

21202231131527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 21202231131527 its reverse (72513113220212), we get a palindrome (93715344351739).

The spelling of 21202231131527 in words is "twenty-one trillion, two hundred two billion, two hundred thirty-one million, one hundred thirty-one thousand, five hundred twenty-seven".