200121111020 has 48 divisors (see below), whose sum is σ = 445042745280. Its totient is φ = 75328272384.

The previous prime is 200121111019. The next prime is 200121111023. The reversal of 200121111020 is 20111121002.

200121111020 is digitally balanced in base 2 and base 3, because in such bases 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 = 200121110992 and 200121111010.

It is not an unprimeable number, because it can be changed into a prime (200121111023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2392952 + ... + 2475168.

It is an arithmetic number, because the mean of its divisors is an integer number (9271723860).

Almost surely, 2^200121111020 is an apocalyptic number.

200121111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121111020 is an abundant number, since it is smaller than the sum of its proper divisors (244921634260).

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

200121111020 is a wasteful number, since it uses less digits than its factorization.

200121111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89402 (or 89400 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200121111020 its reverse (20111121002), we get a palindrome (220232232022).

The spelling of 200121111020 in words is "two hundred billion, one hundred twenty-one million, one hundred eleven thousand, twenty".