200121220111 has 2 divisors, whose sum is σ = 200121220112. Its totient is φ = 200121220110.

The previous prime is 200121220073. The next prime is 200121220127. The reversal of 200121220111 is 111022121002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200121220111 - 2⁷ = 200121219983 is a prime.

It is a super-3 number, since 3×200121220111³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200121220091 and 200121220100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200121220151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060610055 + 100060610056.

It is an arithmetic number, because the mean of its divisors is an integer number (100060610056).

Almost surely, 2^200121220111 is an apocalyptic number.

200121220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

200121220111 is an equidigital number, since it uses as much as digits as its factorization.

200121220111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200121220111 its reverse (111022121002), we get a palindrome (311143341113).

The spelling of 200121220111 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".