101212506529 has 4 divisors (see below), whose sum is σ = 101290543684. Its totient is φ = 101134469376.

The previous prime is 101212506523. The next prime is 101212506533. The reversal of 101212506529 is 925605212101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79849760929 + 21362745600 = 282577^2 + 146160^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212506529 - 2²⁵ = 101178952097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101212506494 and 101212506503.

It is not an unprimeable number, because it can be changed into a prime (101212506523) 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 in 3 ways as a sum of consecutive naturals, for example, 39016632 + ... + 39019225.

It is an arithmetic number, because the mean of its divisors is an integer number (25322635921).

Almost surely, 2^101212506529 is an apocalyptic number.

It is an amenable number.

101212506529 is a deficient number, since it is larger than the sum of its proper divisors (78037155).

101212506529 is an equidigital number, since it uses as much as digits as its factorization.

101212506529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78037154.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 101212506529 in words is "one hundred one billion, two hundred twelve million, five hundred six thousand, five hundred twenty-nine".