1021115040 has 96 divisors (see below), whose sum is σ = 3508940736. Its totient is φ = 247541760.

The previous prime is 1021115009. The next prime is 1021115059. The reversal of 1021115040 is 405111201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91417 + ... + 101976.

It is an arithmetic number, because the mean of its divisors is an integer number (36551466).

Almost surely, 2^1021115040 is an apocalyptic number.

1021115040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021115040 is an abundant number, since it is smaller than the sum of its proper divisors (2487825696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021115040 is a wasteful number, since it uses less digits than its factorization.

1021115040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193422 (or 193414 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1021115040 is about 31954.8907054930. The cubic root of 1021115040 is about 1006.9893814005.

Adding to 1021115040 its reverse (405111201), we get a palindrome (1426226241).

The spelling of 1021115040 in words is "one billion, twenty-one million, one hundred fifteen thousand, forty".