200121221011021 has 4 divisors (see below), whose sum is σ = 200133111065344. Its totient is φ = 200109330956700.

The previous prime is 200121221011007. The next prime is 200121221011027. The reversal of 200121221011021 is 120110122121002.

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 200121221011021 - 2³⁹ = 199571465197133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121221010986 and 200121221011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121221011027) 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, 5945001915 + ... + 5945035576.

It is an arithmetic number, because the mean of its divisors is an integer number (50033277766336).

Almost surely, 2^{200121221011021} is an apocalyptic number.

It is an amenable number.

200121221011021 is a deficient number, since it is larger than the sum of its proper divisors (11890054323).

200121221011021 is a wasteful number, since it uses less digits than its factorization.

200121221011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11890054322.

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

Adding to 200121221011021 its reverse (120110122121002), we get a palindrome (320231343132023).

The spelling of 200121221011021 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, twenty-one".