121121021212020 has 72 divisors (see below), whose sum is σ = 370834079956704. Its totient is φ = 31997079741888.

The previous prime is 121121021212013. The next prime is 121121021212129. The reversal of 121121021212020 is 20212120121121.

121121021212020 is a `hidden beast` number, since 1 + 211 + 210 + 21 + 21 + 202 + 0 = 666.

121121021212020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 = 121121021211984 and 121121021212002.

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, 3144347854 + ... + 3144386373.

It is an arithmetic number, because the mean of its divisors is an integer number (5150473332732).

Almost surely, 2^{121121021212020} is an apocalyptic number.

121121021212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121021212020 is an abundant number, since it is smaller than the sum of its proper divisors (249713058744684).

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

121121021212020 is a wasteful number, since it uses less digits than its factorization.

121121021212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6288734349 (or 6288734344 counting only the distinct ones).

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

Adding to 121121021212020 its reverse (20212120121121), we get a palindrome (141333141333141).

The spelling of 121121021212020 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-one million, two hundred twelve thousand, twenty".