12121110122020 has 24 divisors (see below), whose sum is σ = 25480545850368. Its totient is φ = 4843450792800.

The previous prime is 12121110121957. The next prime is 12121110122029. The reversal of 12121110122020 is 2022101112121.

It is a junction number, because it is equal to n+sod(n) for n = 12121110121985 and 12121110122003.

It is not an unprimeable number, because it can be changed into a prime (12121110122029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312058596 + ... + 312097435.

It is an arithmetic number, because the mean of its divisors is an integer number (1061689410432).

Almost surely, 2^{12121110122020} is an apocalyptic number.

12121110122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121110122020 is an abundant number, since it is smaller than the sum of its proper divisors (13359435728348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121110122020 is a wasteful number, since it uses less digits than its factorization.

12121110122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624157011 (or 624157009 counting only the distinct ones).

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

Adding to 12121110122020 its reverse (2022101112121), we get a palindrome (14143211234141).

The spelling of 12121110122020 in words is "twelve trillion, one hundred twenty-one billion, one hundred ten million, one hundred twenty-two thousand, twenty".