12101001011 has 16 divisors (see below), whose sum is σ = 13240938240. Its totient is φ = 10967769120.

The previous prime is 12101001007. The next prime is 12101001053. The reversal of 12101001011 is 11010010121.

It is a happy number.

It is not a de Polignac number, because 12101001011 - 2² = 12101001007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12101001011.

It is not an unprimeable number, because it can be changed into a prime (12101001061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8327561 + ... + 8329013.

It is an arithmetic number, because the mean of its divisors is an integer number (827558640).

Almost surely, 2^12101001011 is an apocalyptic number.

12101001011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12101001011 is a deficient number, since it is larger than the sum of its proper divisors (1139937229).

12101001011 is a wasteful number, since it uses less digits than its factorization.

12101001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3226.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 12101001011 its reverse (11010010121), we get a palindrome (23111011132).

It can be divided in two parts, 1 and 2101001011, that added together give a palindrome (2101001012).

The spelling of 12101001011 in words is "twelve billion, one hundred one million, one thousand, eleven".