12011200101 has 56 divisors (see below), whose sum is σ = 18428321016. Its totient is φ = 7822189440.

The previous prime is 12011200099. The next prime is 12011200127. The reversal of 12011200101 is 10100211021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6938057025 + 5073143076 = 83295^2 + 71226^2 .

It is not a de Polignac number, because 12011200101 - 2¹ = 12011200099 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011200301) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 11320111 + ... + 11321171.

It is an arithmetic number, because the mean of its divisors is an integer number (329077161).

Almost surely, 2^12011200101 is an apocalyptic number.

It is an amenable number.

12011200101 is a deficient number, since it is larger than the sum of its proper divisors (6417120915).

12011200101 is an equidigital number, since it uses as much as digits as its factorization.

12011200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1410 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12011200101 its reverse (10100211021), we get a palindrome (22111411122).

The spelling of 12011200101 in words is "twelve billion, eleven million, two hundred thousand, one hundred one".