121010101111 has 2 divisors, whose sum is σ = 121010101112. Its totient is φ = 121010101110.

The previous prime is 121010101099. The next prime is 121010101151. The reversal of 121010101111 is 111101010121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121010101111 - 2²⁷ = 120875883383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121010101151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505050555 + 60505050556.

It is an arithmetic number, because the mean of its divisors is an integer number (60505050556).

Almost surely, 2^121010101111 is an apocalyptic number.

121010101111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010101111 is an equidigital number, since it uses as much as digits as its factorization.

121010101111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 121010101111 its reverse (111101010121), we get a palindrome (232111111232).

The spelling of 121010101111 in words is "one hundred twenty-one billion, ten million, one hundred one thousand, one hundred eleven".