102201012102121 has 4 divisors (see below), whose sum is σ = 103105445837652. Its totient is φ = 101296578366592.

The previous prime is 102201012102113. The next prime is 102201012102131. The reversal of 102201012102121 is 121201210102201.

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 39132080958096 + 63068931144025 = 6255564^2 + 7941595^2 .

It is a cyclic number.

It is not a de Polignac number, because 102201012102121 - 2³ = 102201012102113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102201012102095 and 102201012102104.

It is not an unprimeable number, because it can be changed into a prime (102201012102131) 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, 452216867596 + ... + 452216867821.

It is an arithmetic number, because the mean of its divisors is an integer number (25776361459413).

Almost surely, 2^{102201012102121} is an apocalyptic number.

It is an amenable number.

102201012102121 is a deficient number, since it is larger than the sum of its proper divisors (904433735531).

102201012102121 is an equidigital number, since it uses as much as digits as its factorization.

102201012102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904433735530.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102201012102121 its reverse (121201210102201), we get a palindrome (223402222204322).

The spelling of 102201012102121 in words is "one hundred two trillion, two hundred one billion, twelve million, one hundred two thousand, one hundred twenty-one".