200121100120021 has 8 divisors (see below), whose sum is σ = 200558019432960. Its totient is φ = 199684352392752.

The previous prime is 200121100120003. The next prime is 200121100120031. The reversal of 200121100120021 is 120021001121002.

200121100120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 200121100120021 - 2⁴⁵ = 164936728031189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121100119983 and 200121100120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121100120031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40561125 + ... + 45226618.

It is an arithmetic number, because the mean of its divisors is an integer number (25069752429120).

Almost surely, 2^{200121100120021} is an apocalyptic number.

It is an amenable number.

200121100120021 is a deficient number, since it is larger than the sum of its proper divisors (436919312939).

200121100120021 is an equidigital number, since it uses as much as digits as its factorization.

200121100120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85792835.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200121100120021 its reverse (120021001121002), we get a palindrome (320142101241023).

The spelling of 200121100120021 in words is "two hundred trillion, one hundred twenty-one billion, one hundred million, one hundred twenty thousand, twenty-one".