111121012120011 has 4 divisors (see below), whose sum is σ = 148161349493352. Its totient is φ = 74080674746672.

The previous prime is 111121012119983. The next prime is 111121012120021. The reversal of 111121012120011 is 110021210121111.

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

It is a cyclic number.

It is not a de Polignac number, because 111121012120011 - 2⁵ = 111121012119979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111121012120021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18520168686666 + ... + 18520168686671.

It is an arithmetic number, because the mean of its divisors is an integer number (37040337373338).

Almost surely, 2^{111121012120011} is an apocalyptic number.

111121012120011 is a deficient number, since it is larger than the sum of its proper divisors (37040337373341).

111121012120011 is an equidigital number, since it uses as much as digits as its factorization.

111121012120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37040337373340.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111121012120011 its reverse (110021210121111), we get a palindrome (221142222241122).

The spelling of 111121012120011 in words is "one hundred eleven trillion, one hundred twenty-one billion, twelve million, one hundred twenty thousand, eleven".