200121211021121 has 8 divisors (see below), whose sum is σ = 216481585985280. Its totient is φ = 183898898293392.

The previous prime is 200121211021117. The next prime is 200121211021181. The reversal of 200121211021121 is 121120112121002.

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 200121211021121 - 2² = 200121211021117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200121211021121.

It is not an unprimeable number, because it can be changed into a prime (200121211021181) 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, 34515556091 + ... + 34515561888.

It is an arithmetic number, because the mean of its divisors is an integer number (27060198248160).

Almost surely, 2^{200121211021121} is an apocalyptic number.

It is an amenable number.

200121211021121 is a deficient number, since it is larger than the sum of its proper divisors (16360374964159).

200121211021121 is a wasteful number, since it uses less digits than its factorization.

200121211021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69031118215.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 200121211021121 its reverse (121120112121002), we get a palindrome (321241323142123).

The spelling of 200121211021121 in words is "two hundred trillion, one hundred twenty-one billion, two hundred eleven million, twenty-one thousand, one hundred twenty-one".