200121100000011 has 32 divisors (see below), whose sum is σ = 300551928409920. Its totient is φ = 131579946934272.

The previous prime is 200121100000001. The next prime is 200121100000043. The reversal of 200121100000011 is 110000001121002.

It is a happy number.

It is not a de Polignac number, because 200121100000011 - 2⁷ = 200121099999883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200121099999939 and 200121100000002.

It is not an unprimeable number, because it can be changed into a prime (200121100000001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37370155 + ... + 42388331.

It is an arithmetic number, because the mean of its divisors is an integer number (9392247762810).

Almost surely, 2^{200121100000011} is an apocalyptic number.

200121100000011 is a deficient number, since it is larger than the sum of its proper divisors (100430828409909).

200121100000011 is a wasteful number, since it uses less digits than its factorization.

200121100000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038492 (or 5038486 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 200121100000011 its reverse (110000001121002), we get a palindrome (310121101121013).

The spelling of 200121100000011 in words is "two hundred trillion, one hundred twenty-one billion, one hundred million, eleven", and thus it is an aban number.