12012901 has 4 divisors (see below), whose sum is σ = 12337612. Its totient is φ = 11688192.

The previous prime is 12012893. The next prime is 12012907. The reversal of 12012901 is 10921021.

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 8008900 + 4004001 = 2830^2 + 2001^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012901 - 2³ = 12012893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012907) 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, 162300 + ... + 162373.

It is an arithmetic number, because the mean of its divisors is an integer number (3084403).

Almost surely, 2^12012901 is an apocalyptic number.

It is an amenable number.

12012901 is a deficient number, since it is larger than the sum of its proper divisors (324711).

12012901 is an equidigital number, since it uses as much as digits as its factorization.

12012901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324710.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 12012901 is about 3465.9632138844. The cubic root of 12012901 is about 229.0248633403.

Adding to 12012901 its reverse (10921021), we get a palindrome (22933922).

The spelling of 12012901 in words is "twelve million, twelve thousand, nine hundred one".