121101012111 has 4 divisors (see below), whose sum is σ = 161468016152. Its totient is φ = 80734008072.

The previous prime is 121101012103. The next prime is 121101012119. The reversal of 121101012111 is 111210101121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121101012103) and next prime (121101012119).

It is not a de Polignac number, because 121101012111 - 2³ = 121101012103 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 (121101012119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20183502016 + ... + 20183502021.

It is an arithmetic number, because the mean of its divisors is an integer number (40367004038).

Almost surely, 2^121101012111 is an apocalyptic number.

121101012111 is a deficient number, since it is larger than the sum of its proper divisors (40367004041).

121101012111 is an equidigital number, since it uses as much as digits as its factorization.

121101012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40367004040.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121101012111 its reverse (111210101121), we get a palindrome (232311113232).

The spelling of 121101012111 in words is "one hundred twenty-one billion, one hundred one million, twelve thousand, one hundred eleven".