211000200121 has 2 divisors, whose sum is σ = 211000200122. Its totient is φ = 211000200120.

The previous prime is 211000200097. The next prime is 211000200137. The reversal of 211000200121 is 121002000112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208917555625 + 2082644496 = 457075^2 + 45636^2 .

It is a cyclic number.

It is not a de Polignac number, because 211000200121 - 2¹⁹ = 210999675833 is a prime.

It is a super-2 number, since 2×211000200121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211000200098 and 211000200107.

It is not a weakly prime, because it can be changed into another prime (211000600121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500100060 + 105500100061.

It is an arithmetic number, because the mean of its divisors is an integer number (105500100061).

Almost surely, 2^211000200121 is an apocalyptic number.

It is an amenable number.

211000200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211000200121 is an equidigital number, since it uses as much as digits as its factorization.

211000200121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211000200121 its reverse (121002000112), we get a palindrome (332002200233).

Subtracting from 211000200121 its reverse (121002000112), we obtain a square (89998200009 = 299997²).

The spelling of 211000200121 in words is "two hundred eleven billion, two hundred thousand, one hundred twenty-one".