102113012212121 has 4 divisors (see below), whose sum is σ = 102113328677412. Its totient is φ = 102112695746832.

The previous prime is 102113012212109. The next prime is 102113012212199. The reversal of 102113012212121 is 121212210311201.

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 30885083779225 + 71227928432896 = 5557435^2 + 8439664^2 .

It is a cyclic number.

It is not a de Polignac number, because 102113012212121 - 2¹⁰ = 102113012211097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102113012212093 and 102113012212102.

It is not an unprimeable number, because it can be changed into a prime (102113012215121) 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, 157748150 + ... + 158394143.

It is an arithmetic number, because the mean of its divisors is an integer number (25528332169353).

Almost surely, 2^{102113012212121} is an apocalyptic number.

It is an amenable number.

102113012212121 is a deficient number, since it is larger than the sum of its proper divisors (316465291).

102113012212121 is an equidigital number, since it uses as much as digits as its factorization.

102113012212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316465290.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 102113012212121 its reverse (121212210311201), we get a palindrome (223325222523322).

The spelling of 102113012212121 in words is "one hundred two trillion, one hundred thirteen billion, twelve million, two hundred twelve thousand, one hundred twenty-one".