12210011202121 has 4 divisors (see below), whose sum is σ = 12330902402244. Its totient is φ = 12089120002000.

The previous prime is 12210011202107. The next prime is 12210011202163. The reversal of 12210011202121 is 12120211001221.

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 7605124392121 + 4604886810000 = 2757739^2 + 2145900^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210011202121 - 2⁴³ = 3413918179913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210011202095 and 12210011202104.

It is not an unprimeable number, because it can be changed into a prime (12210011202821) 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, 60445599910 + ... + 60445600111.

It is an arithmetic number, because the mean of its divisors is an integer number (3082725600561).

Almost surely, 2^{12210011202121} is an apocalyptic number.

It is an amenable number.

12210011202121 is a deficient number, since it is larger than the sum of its proper divisors (120891200123).

12210011202121 is a wasteful number, since it uses less digits than its factorization.

12210011202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120891200122.

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

Adding to 12210011202121 its reverse (12120211001221), we get a palindrome (24330222203342).

The spelling of 12210011202121 in words is "twelve trillion, two hundred ten billion, eleven million, two hundred two thousand, one hundred twenty-one".