2000111121221 has 2 divisors, whose sum is σ = 2000111121222. Its totient is φ = 2000111121220.

The previous prime is 2000111121187. The next prime is 2000111121223. The reversal of 2000111121221 is 1221211110002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1999709920321 + 401200900 = 1414111^2 + 20030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000111121221 - 2¹⁴ = 2000111104837 is a prime.

Together with 2000111121223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2000111121196 and 2000111121205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000111121223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000055560610 + 1000055560611.

It is an arithmetic number, because the mean of its divisors is an integer number (1000055560611).

Almost surely, 2^{2000111121221} is an apocalyptic number.

It is an amenable number.

2000111121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000111121221 is an equidigital number, since it uses as much as digits as its factorization.

2000111121221 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 14.

Adding to 2000111121221 its reverse (1221211110002), we get a palindrome (3221322231223).

The spelling of 2000111121221 in words is "two trillion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".