200021121210121 has 4 divisors (see below), whose sum is σ = 200022259635072. Its totient is φ = 200019982785172.

The previous prime is 200021121210091. The next prime is 200021121210137. The reversal of 200021121210121 is 121012121120002.

200021121210121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200021121210121 - 2¹³ = 200021121201929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200021121210095 and 200021121210104.

It is not an unprimeable number, because it can be changed into a prime (200021121250121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568948885 + ... + 569300338.

It is an arithmetic number, because the mean of its divisors is an integer number (50005564908768).

Almost surely, 2^{200021121210121} is an apocalyptic number.

It is an amenable number.

200021121210121 is a deficient number, since it is larger than the sum of its proper divisors (1138424951).

200021121210121 is a wasteful number, since it uses less digits than its factorization.

200021121210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138424950.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 200021121210121 its reverse (121012121120002), we get a palindrome (321033242330123).

The spelling of 200021121210121 in words is "two hundred trillion, twenty-one billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".