21202131011 has 2 divisors, whose sum is σ = 21202131012. Its totient is φ = 21202131010.

The previous prime is 21202131001. The next prime is 21202131029. The reversal of 21202131011 is 11013120212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202131011 - 2⁶ = 21202130947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21202131001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601065505 + 10601065506.

It is an arithmetic number, because the mean of its divisors is an integer number (10601065506).

Almost surely, 2^21202131011 is an apocalyptic number.

21202131011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202131011 is an equidigital number, since it uses as much as digits as its factorization.

21202131011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21202131011 its reverse (11013120212), we get a palindrome (32215251223).

The spelling of 21202131011 in words is "twenty-one billion, two hundred two million, one hundred thirty-one thousand, eleven".