200121202112021 has 8 divisors (see below), whose sum is σ = 203050646229888. Its totient is φ = 197194836762000.

The previous prime is 200121202111993. The next prime is 200121202112033. The reversal of 200121202112021 is 120211202121002.

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 200121202112021 - 2¹⁴ = 200121202095637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121202142021) 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, 769561010 + ... + 769821011.

It is an arithmetic number, because the mean of its divisors is an integer number (25381330778736).

Almost surely, 2^{200121202112021} is an apocalyptic number.

It is an amenable number.

200121202112021 is a deficient number, since it is larger than the sum of its proper divisors (2929444117867).

200121202112021 is a wasteful number, since it uses less digits than its factorization.

200121202112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539383923.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 200121202112021 its reverse (120211202121002), we get a palindrome (320332404233023).

The spelling of 200121202112021 in words is "two hundred trillion, one hundred twenty-one billion, two hundred two million, one hundred twelve thousand, twenty-one".