2102231122121 has 12 divisors (see below), whose sum is σ = 2354876328780. Its totient is φ = 1873606512960.

The previous prime is 2102231122093. The next prime is 2102231122129. The reversal of 2102231122121 is 1212211322012.

It can be written as a sum of positive squares in 6 ways, for example, as 69268449721 + 2032962672400 = 263189^2 + 1425820^2 .

It is not a de Polignac number, because 2102231122121 - 2²² = 2102226927817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102231122093 and 2102231122102.

It is not an unprimeable number, because it can be changed into a prime (2102231122129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214464710 + ... + 214474511.

It is an arithmetic number, because the mean of its divisors is an integer number (196239694065).

Almost surely, 2^{2102231122121} is an apocalyptic number.

It is an amenable number.

2102231122121 is a deficient number, since it is larger than the sum of its proper divisors (252645206659).

2102231122121 is a wasteful number, since it uses less digits than its factorization.

2102231122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428939276 (or 428939263 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2102231122121 its reverse (1212211322012), we get a palindrome (3314442444133).

The spelling of 2102231122121 in words is "two trillion, one hundred two billion, two hundred thirty-one million, one hundred twenty-two thousand, one hundred twenty-one".