1021161244 has 24 divisors (see below), whose sum is σ = 1803529728. Its totient is φ = 505879920.

The previous prime is 1021161233. The next prime is 1021161247. The reversal of 1021161244 is 4421611201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021161247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461589 + ... + 463795.

It is an arithmetic number, because the mean of its divisors is an integer number (75147072).

Almost surely, 2^1021161244 is an apocalyptic number.

It is an amenable number.

1021161244 is a deficient number, since it is larger than the sum of its proper divisors (782368484).

1021161244 is a wasteful number, since it uses less digits than its factorization.

1021161244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225 (or 3223 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1021161244 is about 31955.6136539419. The cubic root of 1021161244 is about 1007.0045694494.

Adding to 1021161244 its reverse (4421611201), we get a palindrome (5442772445).

The spelling of 1021161244 in words is "one billion, twenty-one million, one hundred sixty-one thousand, two hundred forty-four".