1021240133 has 8 divisors (see below), whose sum is σ = 1118600280. Its totient is φ = 928023040.

The previous prime is 1021240127. The next prime is 1021240169. The reversal of 1021240133 is 3310421201.

It can be written as a sum of positive squares in 4 ways, for example, as 391129729 + 630110404 = 19777^2 + 25102^2 .

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 1021240133 - 2¹² = 1021236037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021240183) 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, 1035248 + ... + 1036233.

It is an arithmetic number, because the mean of its divisors is an integer number (139825035).

Almost surely, 2^1021240133 is an apocalyptic number.

It is an amenable number.

1021240133 is a deficient number, since it is larger than the sum of its proper divisors (97360147).

1021240133 is a wasteful number, since it uses less digits than its factorization.

1021240133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071527.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1021240133 is about 31956.8479828659. The cubic root of 1021240133 is about 1007.0305005608.

Adding to 1021240133 its reverse (3310421201), we get a palindrome (4331661334).

The spelling of 1021240133 in words is "one billion, twenty-one million, two hundred forty thousand, one hundred thirty-three".