121220202112020 has 192 divisors, whose sum is σ = 425600710214400. Its totient is φ = 28373380600320.

The previous prime is 121220202112019. The next prime is 121220202112039. The reversal of 121220202112020 is 20211202022121.

It is a happy number.

121220202112020 is a `hidden beast` number, since 1 + 212 + 20 + 20 + 211 + 202 + 0 = 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 = 121220202111984 and 121220202112002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 351680179 + ... + 352024698.

It is an arithmetic number, because the mean of its divisors is an integer number (2216670365700).

Almost surely, 2^{121220202112020} is an apocalyptic number.

121220202112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220202112020 is an abundant number, since it is smaller than the sum of its proper divisors (304380508102380).

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

121220202112020 is a wasteful number, since it uses less digits than its factorization.

121220202112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703704935 (or 703704927 counting only the distinct ones).

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

Adding to 121220202112020 its reverse (20211202022121), we get a palindrome (141431404134141).

The spelling of 121220202112020 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred two million, one hundred twelve thousand, twenty".