21032122121033 has 4 divisors (see below), whose sum is σ = 21032314619028. Its totient is φ = 21031929623040.

The previous prime is 21032122120939. The next prime is 21032122121041. The reversal of 21032122121033 is 33012122123012.

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 4263531188224 + 16768590932809 = 2064832^2 + 4094947^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032122121033 - 2³² = 21027827153737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21032122171033) 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, 96085016 + ... + 96303657.

It is an arithmetic number, because the mean of its divisors is an integer number (5258078654757).

Almost surely, 2^{21032122121033} is an apocalyptic number.

It is an amenable number.

21032122121033 is a deficient number, since it is larger than the sum of its proper divisors (192497995).

21032122121033 is a wasteful number, since it uses less digits than its factorization.

21032122121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192497994.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21032122121033 its reverse (33012122123012), we get a palindrome (54044244244045).

The spelling of 21032122121033 in words is "twenty-one trillion, thirty-two billion, one hundred twenty-two million, one hundred twenty-one thousand, thirty-three".