200111122021 has 2 divisors, whose sum is σ = 200111122022. Its totient is φ = 200111122020.

The previous prime is 200111122019. The next prime is 200111122067. The reversal of 200111122021 is 120221111002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110117121921 + 89994000100 = 331839^2 + 299990^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111122021 - 2¹ = 200111122019 is a prime.

It is a super-2 number, since 2×200111122021² (a number of 23 digits) contains 22 as substring.

Together with 200111122019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 200111121992 and 200111122010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200111122091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100055561010 + 100055561011.

It is an arithmetic number, because the mean of its divisors is an integer number (100055561011).

Almost surely, 2^200111122021 is an apocalyptic number.

It is an amenable number.

200111122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200111122021 is an equidigital number, since it uses as much as digits as its factorization.

200111122021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 200111122021 its reverse (120221111002), we get a palindrome (320332233023).

The spelling of 200111122021 in words is "two hundred billion, one hundred eleven million, one hundred twenty-two thousand, twenty-one".