101231221211 has 2 divisors, whose sum is σ = 101231221212. Its totient is φ = 101231221210.

The previous prime is 101231221193. The next prime is 101231221241. The reversal of 101231221211 is 112122132101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101231221211 is a prime.

It is a super-3 number, since 3×101231221211³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101231221211.

It is not a weakly prime, because it can be changed into another prime (101231221241) 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, 50615610605 + 50615610606.

It is an arithmetic number, because the mean of its divisors is an integer number (50615610606).

Almost surely, 2^101231221211 is an apocalyptic number.

101231221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

101231221211 is an equidigital number, since it uses as much as digits as its factorization.

101231221211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 101231221211 its reverse (112122132101), we get a palindrome (213353353312).

The spelling of 101231221211 in words is "one hundred one billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred eleven".