200121021011 has 8 divisors (see below), whose sum is σ = 209559828480. Its totient is φ = 190743704712.

The previous prime is 200121020993. The next prime is 200121021029. The reversal of 200121021011 is 110120121002.

It is an interprime number because it is at equal distance from previous prime (200121020993) and next prime (200121021029).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121021011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121020983 and 200121021001.

It is not an unprimeable number, because it can be changed into a prime (200121021071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15366131 + ... + 15379148.

It is an arithmetic number, because the mean of its divisors is an integer number (26194978560).

Almost surely, 2^200121021011 is an apocalyptic number.

200121021011 is a deficient number, since it is larger than the sum of its proper divisors (9438807469).

200121021011 is a wasteful number, since it uses less digits than its factorization.

200121021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30745585.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200121021011 its reverse (110120121002), we get a palindrome (310241142013).

Subtracting from 200121021011 its reverse (110120121002), we obtain a palindrome (90000900009).

The spelling of 200121021011 in words is "two hundred billion, one hundred twenty-one million, twenty-one thousand, eleven".