21043453141201 has 6 divisors (see below), whose sum is σ = 21744171665106. Its totient is φ = 20364632071200.

The previous prime is 21043453141057. The next prime is 21043453141223. The reversal of 21043453141201 is 10214135434012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20480467036225 + 562986104976 = 4525535^2 + 750324^2 .

It is not a de Polignac number, because 21043453141201 - 2¹¹ = 21043453139153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21043453141241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10948725960 + ... + 10948727881.

It is an arithmetic number, because the mean of its divisors is an integer number (3624028610851).

Almost surely, 2^{21043453141201} is an apocalyptic number.

It is an amenable number.

21043453141201 is a deficient number, since it is larger than the sum of its proper divisors (700718523905).

21043453141201 is an equidigital number, since it uses as much as digits as its factorization.

21043453141201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21897453903 (or 21897453872 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 21043453141201 its reverse (10214135434012), we get a palindrome (31257588575213).

The spelling of 21043453141201 in words is "twenty-one trillion, forty-three billion, four hundred fifty-three million, one hundred forty-one thousand, two hundred one".