121100011011 has 32 divisors (see below), whose sum is σ = 205061427200. Its totient is φ = 69191781120.

The previous prime is 121100010979. The next prime is 121100011051. The reversal of 121100011011 is 110110001121.

It is not a de Polignac number, because 121100011011 - 2⁵ = 121100010979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121100010984 and 121100011002.

It is not an unprimeable number, because it can be changed into a prime (121100011051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1786995 + ... + 1853523.

It is an arithmetic number, because the mean of its divisors is an integer number (6408169600).

Almost surely, 2^121100011011 is an apocalyptic number.

121100011011 is a deficient number, since it is larger than the sum of its proper divisors (83961416189).

121100011011 is an equidigital number, since it uses as much as digits as its factorization.

121100011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76176 (or 76170 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 121100011011 its reverse (110110001121), we get a palindrome (231210012132).

The spelling of 121100011011 in words is "one hundred twenty-one billion, one hundred million, eleven thousand, eleven".