12100373821 has 4 divisors (see below), whose sum is σ = 12107522812. Its totient is φ = 12093224832.

The previous prime is 12100373819. The next prime is 12100373837. The reversal of 12100373821 is 12837300121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4480829721 + 7619544100 = 66939^2 + 87290^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100373821 - 2¹ = 12100373819 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 12100373821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100373891) 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, 3571956 + ... + 3575341.

It is an arithmetic number, because the mean of its divisors is an integer number (3026880703).

Almost surely, 2^12100373821 is an apocalyptic number.

It is an amenable number.

12100373821 is a deficient number, since it is larger than the sum of its proper divisors (7148991).

12100373821 is an equidigital number, since it uses as much as digits as its factorization.

12100373821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7148990.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 12100373821 its reverse (12837300121), we get a palindrome (24937673942).

The spelling of 12100373821 in words is "twelve billion, one hundred million, three hundred seventy-three thousand, eight hundred twenty-one".