12120012011101 has 4 divisors (see below), whose sum is σ = 12120019963804. Its totient is φ = 12120004058400.

The previous prime is 12120012011099. The next prime is 12120012011113. The reversal of 12120012011101 is 10111021002121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6795797265625 + 5324214745476 = 2606875^2 + 2307426^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120012011101 - 2¹ = 12120012011099 is a prime.

It is a super-2 number, since 2×12120012011101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120012041101) 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, 893760 + ... + 5003881.

It is an arithmetic number, because the mean of its divisors is an integer number (3030004990951).

Almost surely, 2^{12120012011101} is an apocalyptic number.

It is an amenable number.

12120012011101 is a deficient number, since it is larger than the sum of its proper divisors (7952703).

12120012011101 is an equidigital number, since it uses as much as digits as its factorization.

12120012011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7952702.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12120012011101 its reverse (10111021002121), we get a palindrome (22231033013222).

The spelling of 12120012011101 in words is "twelve trillion, one hundred twenty billion, twelve million, eleven thousand, one hundred one".