200121020111 has 4 divisors (see below), whose sum is σ = 210653705400. Its totient is φ = 189588334824.

The previous prime is 200121020093. The next prime is 200121020117. The reversal of 200121020111 is 111020121002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121020111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121020092 and 200121020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121020117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5266342616 + ... + 5266342653.

It is an arithmetic number, because the mean of its divisors is an integer number (52663426350).

Almost surely, 2^200121020111 is an apocalyptic number.

200121020111 is a deficient number, since it is larger than the sum of its proper divisors (10532685289).

200121020111 is a wasteful number, since it uses less digits than its factorization.

200121020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10532685288.

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

Adding to 200121020111 its reverse (111020121002), we get a palindrome (311141141113).

The spelling of 200121020111 in words is "two hundred billion, one hundred twenty-one million, twenty thousand, one hundred eleven".