102210211110121 has 4 divisors (see below), whose sum is σ = 102210336242244. Its totient is φ = 102210085978000.

The previous prime is 102210211110109. The next prime is 102210211110151. The reversal of 102210211110121 is 121011112012201.

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 575988405721 + 101634222704400 = 758939^2 + 10081380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102210211110121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102210211110095 and 102210211110104.

It is not an unprimeable number, because it can be changed into a prime (102210211110151) 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, 61332730 + ... + 62977171.

It is an arithmetic number, because the mean of its divisors is an integer number (25552584060561).

Almost surely, 2^{102210211110121} is an apocalyptic number.

It is an amenable number.

102210211110121 is a deficient number, since it is larger than the sum of its proper divisors (125132123).

102210211110121 is an equidigital number, since it uses as much as digits as its factorization.

102210211110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125132122.

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

Adding to 102210211110121 its reverse (121011112012201), we get a palindrome (223221323122322).

The spelling of 102210211110121 in words is "one hundred two trillion, two hundred ten billion, two hundred eleven million, one hundred ten thousand, one hundred twenty-one".