101210121211 has 2 divisors, whose sum is σ = 101210121212. Its totient is φ = 101210121210.

The previous prime is 101210121209. The next prime is 101210121217. The reversal of 101210121211 is 112121012101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101210121211 - 2¹ = 101210121209 is a prime.

Together with 101210121209, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 101210121191 and 101210121200.

It is not a weakly prime, because it can be changed into another prime (101210121217) 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, 50605060605 + 50605060606.

It is an arithmetic number, because the mean of its divisors is an integer number (50605060606).

Almost surely, 2^101210121211 is an apocalyptic number.

101210121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

101210121211 is an equidigital number, since it uses as much as digits as its factorization.

101210121211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101210121211 its reverse (112121012101), we get a palindrome (213331133312).

The spelling of 101210121211 in words is "one hundred one billion, two hundred ten million, one hundred twenty-one thousand, two hundred eleven".