12120202112121 has 28 divisors (see below), whose sum is σ = 18185285103552. Its totient is φ = 8074223225496.

The previous prime is 12120202112113. The next prime is 12120202112131. The reversal of 12120202112121 is 12121120202121.

It is not a de Polignac number, because 12120202112121 - 2³ = 12120202112113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120202112094 and 12120202112103.

It is not an unprimeable number, because it can be changed into a prime (12120202112131) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5084581 + ... + 7077666.

It is an arithmetic number, because the mean of its divisors is an integer number (649474467984).

Almost surely, 2^{12120202112121} is an apocalyptic number.

It is an amenable number.

12120202112121 is a deficient number, since it is larger than the sum of its proper divisors (6065082991431).

12120202112121 is an equidigital number, since it uses as much as digits as its factorization.

12120202112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12163632 (or 12163617 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12120202112121 its reverse (12121120202121), we get a palindrome (24241322314242).

Subtracting 12120202112121 from its reverse (12121120202121), we obtain a square (918090000 = 30300²).

The spelling of 12120202112121 in words is "twelve trillion, one hundred twenty billion, two hundred two million, one hundred twelve thousand, one hundred twenty-one".