1212144112001 has 4 divisors (see below), whose sum is σ = 1212150347604. Its totient is φ = 1212137876400.

The previous prime is 1212144111973. The next prime is 1212144112033. The reversal of 1212144112001 is 1002114412121.

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 358709957776 + 853434154225 = 598924^2 + 923815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212144112001 - 2¹⁸ = 1212143849857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212144112301) 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, 2816510 + ... + 3218231.

It is an arithmetic number, because the mean of its divisors is an integer number (303037586901).

Almost surely, 2^{1212144112001} is an apocalyptic number.

It is an amenable number.

1212144112001 is a deficient number, since it is larger than the sum of its proper divisors (6235603).

1212144112001 is an equidigital number, since it uses as much as digits as its factorization.

1212144112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6235602.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 1212144112001 its reverse (1002114412121), we get a palindrome (2214258524122).

The spelling of 1212144112001 in words is "one trillion, two hundred twelve billion, one hundred forty-four million, one hundred twelve thousand, one".