111021112121011 has 4 divisors (see below), whose sum is σ = 111021149746872. Its totient is φ = 111021074495152.

The previous prime is 111021112120979. The next prime is 111021112121027. The reversal of 111021112121011 is 110121211120111.

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 111021112121011 - 2⁵ = 111021112120979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111021112151011) 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, 13971661 + ... + 20426686.

It is an arithmetic number, because the mean of its divisors is an integer number (27755287436718).

Almost surely, 2^{111021112121011} is an apocalyptic number.

111021112121011 is a deficient number, since it is larger than the sum of its proper divisors (37625861).

111021112121011 is an equidigital number, since it uses as much as digits as its factorization.

111021112121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37625860.

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

Adding to 111021112121011 its reverse (110121211120111), we get a palindrome (221142323241122).

The spelling of 111021112121011 in words is "one hundred eleven trillion, twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, eleven".