121222112020 has 12 divisors (see below), whose sum is σ = 254566435284. Its totient is φ = 48488844800.

The previous prime is 121222112003. The next prime is 121222112047. The reversal of 121222112020 is 20211222121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35441074564 + 85781037456 = 188258^2 + 292884^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121222111985 and 121222112003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030552781 + ... + 3030552820.

It is an arithmetic number, because the mean of its divisors is an integer number (21213869607).

Almost surely, 2^121222112020 is an apocalyptic number.

121222112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222112020 is an abundant number, since it is smaller than the sum of its proper divisors (133344323264).

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

121222112020 is a wasteful number, since it uses less digits than its factorization.

121222112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061105610 (or 6061105608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121222112020 its reverse (20211222121), we get a palindrome (141433334141).

The spelling of 121222112020 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, twenty".