102111200121121 has 4 divisors (see below), whose sum is σ = 102111862659732. Its totient is φ = 102110537582512.

The previous prime is 102111200121103. The next prime is 102111200121223. The reversal of 102111200121121 is 121121002111201.

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 758355338896 + 101352844782225 = 870836^2 + 10067415^2 .

It is a cyclic number.

It is not a de Polignac number, because 102111200121121 - 2³³ = 102102610186529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102111200121095 and 102111200121104.

It is not an unprimeable number, because it can be changed into a prime (102111200122121) 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, 331038070 + ... + 331346383.

It is an arithmetic number, because the mean of its divisors is an integer number (25527965664933).

Almost surely, 2^{102111200121121} is an apocalyptic number.

It is an amenable number.

102111200121121 is a deficient number, since it is larger than the sum of its proper divisors (662538611).

102111200121121 is an equidigital number, since it uses as much as digits as its factorization.

102111200121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662538610.

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

Adding to 102111200121121 its reverse (121121002111201), we get a palindrome (223232202232322).

It can be divided in two parts, 102111200 and 121121, that added together give a square (102232321 = 10111²).

The spelling of 102111200121121 in words is "one hundred two trillion, one hundred eleven billion, two hundred million, one hundred twenty-one thousand, one hundred twenty-one".