101212122113 has 4 divisors (see below), whose sum is σ = 101248571460. Its totient is φ = 101175672768.

The previous prime is 101212122103. The next prime is 101212122139. The reversal of 101212122113 is 311221212101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311221212101 = 43 ⋅7237702607.

It can be written as a sum of positive squares in 2 ways, for example, as 4644695104 + 96567427009 = 68152^2 + 310753^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212122113 - 2³⁰ = 100138380289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101212122091 and 101212122100.

It is not an unprimeable number, because it can be changed into a prime (101212122103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18220508 + ... + 18226061.

It is an arithmetic number, because the mean of its divisors is an integer number (25312142865).

Almost surely, 2^101212122113 is an apocalyptic number.

It is an amenable number.

101212122113 is a deficient number, since it is larger than the sum of its proper divisors (36449347).

101212122113 is an equidigital number, since it uses as much as digits as its factorization.

101212122113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36449346.

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

Adding to 101212122113 its reverse (311221212101), we get a palindrome (412433334214).

The spelling of 101212122113 in words is "one hundred one billion, two hundred twelve million, one hundred twenty-two thousand, one hundred thirteen".