1234441100021 has 4 divisors (see below), whose sum is σ = 1234443738444. Its totient is φ = 1234438461600.

The previous prime is 1234441100003. The next prime is 1234441100051. The reversal of 1234441100021 is 1200011444321.

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 572805271921 + 661635828100 = 756839^2 + 813410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234441100021 - 2²⁶ = 1234373991157 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 1234441100021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234441100051) 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, 407270 + ... + 1623191.

It is an arithmetic number, because the mean of its divisors is an integer number (308610934611).

Almost surely, 2^{1234441100021} is an apocalyptic number.

It is an amenable number.

1234441100021 is a deficient number, since it is larger than the sum of its proper divisors (2638423).

1234441100021 is an equidigital number, since it uses as much as digits as its factorization.

1234441100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638422.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1234441100021 its reverse (1200011444321), we get a palindrome (2434452544342).

The spelling of 1234441100021 in words is "one trillion, two hundred thirty-four billion, four hundred forty-one million, one hundred thousand, twenty-one".