21033132001121 has 8 divisors (see below), whose sum is σ = 21069396902664. Its totient is φ = 20996869780480.

The previous prime is 21033132001103. The next prime is 21033132001153. The reversal of 21033132001121 is 12110023133012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8688133534096 + 12344998467025 = 2947564^2 + 3513545^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21033132001121 - 2¹⁴ = 21033131984737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033132001093 and 21033132001102.

It is not an unprimeable number, because it can be changed into a prime (21033132001171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15364661 + ... + 16677501.

It is an arithmetic number, because the mean of its divisors is an integer number (2633674612833).

Almost surely, 2^{21033132001121} is an apocalyptic number.

It is an amenable number.

21033132001121 is a deficient number, since it is larger than the sum of its proper divisors (36264901543).

21033132001121 is a wasteful number, since it uses less digits than its factorization.

21033132001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340451.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21033132001121 its reverse (12110023133012), we get a palindrome (33143155134133).

The spelling of 21033132001121 in words is "twenty-one trillion, thirty-three billion, one hundred thirty-two million, one thousand, one hundred twenty-one".