121030312111 has 2 divisors, whose sum is σ = 121030312112. Its totient is φ = 121030312110.

The previous prime is 121030312099. The next prime is 121030312177. The reversal of 121030312111 is 111213030121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (111213030121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121030312111 - 2⁹ = 121030311599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121030312411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60515156055 + 60515156056.

It is an arithmetic number, because the mean of its divisors is an integer number (60515156056).

Almost surely, 2^121030312111 is an apocalyptic number.

121030312111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121030312111 is an equidigital number, since it uses as much as digits as its factorization.

121030312111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121030312111 its reverse (111213030121), we get a palindrome (232243342232).

The spelling of 121030312111 in words is "one hundred twenty-one billion, thirty million, three hundred twelve thousand, one hundred eleven".