1021144136 has 16 divisors (see below), whose sum is σ = 1916769840. Its totient is φ = 510005520.

The previous prime is 1021144129. The next prime is 1021144147. The reversal of 1021144136 is 6314411201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63110 + ... + 77621.

It is an arithmetic number, because the mean of its divisors is an integer number (119798115).

Almost surely, 2^1021144136 is an apocalyptic number.

It is an amenable number.

1021144136 is a deficient number, since it is larger than the sum of its proper divisors (895625704).

1021144136 is a wasteful number, since it uses less digits than its factorization.

1021144136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141644 (or 141640 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1021144136 is about 31955.3459690237. The cubic root of 1021144136 is about 1006.9989458092.

Adding to 1021144136 its reverse (6314411201), we get a palindrome (7335555337).

The spelling of 1021144136 in words is "one billion, twenty-one million, one hundred forty-four thousand, one hundred thirty-six".