31202120011 has 2 divisors, whose sum is σ = 31202120012. Its totient is φ = 31202120010.

The previous prime is 31202119967. The next prime is 31202120021. The reversal of 31202120011 is 11002120213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31202120011 - 2²⁹ = 30665249099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31202119973 and 31202120000.

It is not a weakly prime, because it can be changed into another prime (31202120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15601060005 + 15601060006.

It is an arithmetic number, because the mean of its divisors is an integer number (15601060006).

Almost surely, 2^31202120011 is an apocalyptic number.

31202120011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31202120011 is an equidigital number, since it uses as much as digits as its factorization.

31202120011 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 13.

Adding to 31202120011 its reverse (11002120213), we get a palindrome (42204240224).

The spelling of 31202120011 in words is "thirty-one billion, two hundred two million, one hundred twenty thousand, eleven".