211110030121 has 2 divisors, whose sum is σ = 211110030122. Its totient is φ = 211110030120.

The previous prime is 211110030073. The next prime is 211110030151. The reversal of 211110030121 is 121030011112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141572340121 + 69537690000 = 376261^2 + 263700^2 .

It is a cyclic number.

It is not a de Polignac number, because 211110030121 - 2¹³ = 211110021929 is a prime.

It is not a weakly prime, because it can be changed into another prime (211110030151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105555015060 + 105555015061.

It is an arithmetic number, because the mean of its divisors is an integer number (105555015061).

Almost surely, 2^211110030121 is an apocalyptic number.

It is an amenable number.

211110030121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211110030121 is an equidigital number, since it uses as much as digits as its factorization.

211110030121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 211110030121 its reverse (121030011112), we get a palindrome (332140041233).

The spelling of 211110030121 in words is "two hundred eleven billion, one hundred ten million, thirty thousand, one hundred twenty-one".