21143141443301 has 4 divisors (see below), whose sum is σ = 21143172837612. Its totient is φ = 21143110048992.

The previous prime is 21143141443297. The next prime is 21143141443327. The reversal of 21143141443301 is 10334414134112.

It is a happy number.

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 7364308803076 + 13778832640225 = 2713726^2 + 3711985^2 .

It is a cyclic number.

It is not a de Polignac number, because 21143141443301 - 2² = 21143141443297 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 (21143141443001) 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, 14664296 + ... + 16041441.

It is an arithmetic number, because the mean of its divisors is an integer number (5285793209403).

Almost surely, 2^{21143141443301} is an apocalyptic number.

It is an amenable number.

21143141443301 is a deficient number, since it is larger than the sum of its proper divisors (31394311).

21143141443301 is an equidigital number, since it uses as much as digits as its factorization.

21143141443301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31394310.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 21143141443301 its reverse (10334414134112), we get a palindrome (31477555577413).

The spelling of 21143141443301 in words is "twenty-one trillion, one hundred forty-three billion, one hundred forty-one million, four hundred forty-three thousand, three hundred one".