12121000012220 has 72 divisors (see below), whose sum is σ = 27981310672224. Its totient is φ = 4407189424000.

The previous prime is 12121000012139. The next prime is 12121000012309. The reversal of 12121000012220 is 2221000012121.

12121000012220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12121000012195 and 12121000012204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24098705 + ... + 24596535.

It is an arithmetic number, because the mean of its divisors is an integer number (388629314892).

Almost surely, 2^{12121000012220} is an apocalyptic number.

12121000012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121000012220 is an abundant number, since it is smaller than the sum of its proper divisors (15860310660004).

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

12121000012220 is a wasteful number, since it uses less digits than its factorization.

12121000012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507923 (or 507910 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12121000012220 its reverse (2221000012121), we get a palindrome (14342000024341).

Subtracting from 12121000012220 its reverse (2221000012121), we obtain a palindrome (9900000000099).

The spelling of 12121000012220 in words is "twelve trillion, one hundred twenty-one billion, twelve thousand, two hundred twenty".