121012011011 has 4 divisors (see below), whose sum is σ = 121276807992. Its totient is φ = 120747214032.

The previous prime is 121012010993. The next prime is 121012011017. The reversal of 121012011011 is 110110210121.

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 121012011011 - 2²² = 121007816707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012010983 and 121012011001.

It is not an unprimeable number, because it can be changed into a prime (121012011017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132397805 + ... + 132398718.

It is an arithmetic number, because the mean of its divisors is an integer number (30319201998).

Almost surely, 2^121012011011 is an apocalyptic number.

121012011011 is a deficient number, since it is larger than the sum of its proper divisors (264796981).

121012011011 is an equidigital number, since it uses as much as digits as its factorization.

121012011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264796980.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121012011011 its reverse (110110210121), we get a palindrome (231122221132).

The spelling of 121012011011 in words is "one hundred twenty-one billion, twelve million, eleven thousand, eleven".