121010211121111 has 16 divisors (see below), whose sum is σ = 132778166873184. Its totient is φ = 109593629518464.

The previous prime is 121010211121097. The next prime is 121010211121127. The reversal of 121010211121111 is 111121112010121.

It is not a de Polignac number, because 121010211121111 - 2²⁷ = 121010076903383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010211161111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271785805 + ... + 272230681.

It is an arithmetic number, because the mean of its divisors is an integer number (8298635429574).

Almost surely, 2^{121010211121111} is an apocalyptic number.

121010211121111 is a deficient number, since it is larger than the sum of its proper divisors (11767955752073).

121010211121111 is a wasteful number, since it uses less digits than its factorization.

121010211121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839730.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 121010211121111 its reverse (111121112010121), we get a palindrome (232131323131232).

The spelling of 121010211121111 in words is "one hundred twenty-one trillion, ten billion, two hundred eleven million, one hundred twenty-one thousand, one hundred eleven".