101213010121 has 2 divisors, whose sum is σ = 101213010122. Its totient is φ = 101213010120.

The previous prime is 101213010091. The next prime is 101213010139. The reversal of 101213010121 is 121010312101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100248224400 + 964785721 = 316620^2 + 31061^2 .

It is a cyclic number.

It is not a de Polignac number, because 101213010121 - 2³³ = 92623075529 is a prime.

It is not a weakly prime, because it can be changed into another prime (101213010421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606505060 + 50606505061.

It is an arithmetic number, because the mean of its divisors is an integer number (50606505061).

Almost surely, 2^101213010121 is an apocalyptic number.

It is an amenable number.

101213010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101213010121 is an equidigital number, since it uses as much as digits as its factorization.

101213010121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 101213010121 its reverse (121010312101), we get a palindrome (222223322222).

The spelling of 101213010121 in words is "one hundred one billion, two hundred thirteen million, ten thousand, one hundred twenty-one".