210121110011 has 2 divisors, whose sum is σ = 210121110012. Its totient is φ = 210121110010.

The previous prime is 210121109971. The next prime is 210121110019. The reversal of 210121110011 is 110011121012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210121110011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210121109974 and 210121110001.

It is not a weakly prime, because it can be changed into another prime (210121110019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060555005 + 105060555006.

It is an arithmetic number, because the mean of its divisors is an integer number (105060555006).

Almost surely, 2^210121110011 is an apocalyptic number.

210121110011 is a deficient number, since it is larger than the sum of its proper divisors (1).

210121110011 is an equidigital number, since it uses as much as digits as its factorization.

210121110011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 210121110011 its reverse (110011121012), we get a palindrome (320132231023).

The spelling of 210121110011 in words is "two hundred ten billion, one hundred twenty-one million, one hundred ten thousand, eleven".