12121221022020 has 72 divisors (see below), whose sum is σ = 40110222297600. Its totient is φ = 2938477823040.

The previous prime is 12121221022013. The next prime is 12121221022067. The reversal of 12121221022020 is 2022012212121.

It is a happy number.

12121221022020 is a `hidden beast` number, since 1 + 2 + 1 + 212 + 210 + 220 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12121221021984 and 12121221022002.

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, 3060912420 + ... + 3060916379.

It is an arithmetic number, because the mean of its divisors is an integer number (557086420800).

Almost surely, 2^{12121221022020} is an apocalyptic number.

12121221022020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121221022020 is an abundant number, since it is smaller than the sum of its proper divisors (27989001275580).

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

12121221022020 is a wasteful number, since it uses less digits than its factorization.

12121221022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6121828825 (or 6121828820 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12121221022020 its reverse (2022012212121), we get a palindrome (14143233234141).

The spelling of 12121221022020 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, twenty".