200121020111121 has 8 divisors (see below), whose sum is σ = 266984157908160. Its totient is φ = 133335947860752.

The previous prime is 200121020111113. The next prime is 200121020111161. The reversal of 200121020111121 is 121111020121002.

It is a happy number.

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

It is not a de Polignac number, because 200121020111121 - 2³ = 200121020111113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200121020111121.

It is not an unprimeable number, because it can be changed into a prime (200121020111161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19516380685 + ... + 19516390938.

It is an arithmetic number, because the mean of its divisors is an integer number (33373019738520).

Almost surely, 2^{200121020111121} is an apocalyptic number.

It is an amenable number.

200121020111121 is a deficient number, since it is larger than the sum of its proper divisors (66863137797039).

200121020111121 is a wasteful number, since it uses less digits than its factorization.

200121020111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39032773335.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 200121020111121 its reverse (121111020121002), we get a palindrome (321232040232123).

The spelling of 200121020111121 in words is "two hundred trillion, one hundred twenty-one billion, twenty million, one hundred eleven thousand, one hundred twenty-one".