20133241021 has 8 divisors (see below), whose sum is σ = 20266184664. Its totient is φ = 20000608320.

The previous prime is 20133240989. The next prime is 20133241031. The reversal of 20133241021 is 12014233102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6679792900 + 13453448121 = 81730^2 + 115989^2 .

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 20133241021 - 2⁵ = 20133240989 is a prime.

It is a super-3 number, since 3×20133241021³ (a number of 32 digits) contains 333 as substring.

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 20133241021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133241031) 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, 52911 + ... + 207523.

It is an arithmetic number, because the mean of its divisors is an integer number (2533273083).

Almost surely, 2^20133241021 is an apocalyptic number.

It is an amenable number.

20133241021 is a deficient number, since it is larger than the sum of its proper divisors (132943643).

20133241021 is a wasteful number, since it uses less digits than its factorization.

20133241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155471.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20133241021 its reverse (12014233102), we get a palindrome (32147474123).

The spelling of 20133241021 in words is "twenty billion, one hundred thirty-three million, two hundred forty-one thousand, twenty-one".