1021178116 has 12 divisors (see below), whose sum is σ = 2042356288. Its totient is φ = 437647752.

The previous prime is 1021178111. The next prime is 1021178129. The reversal of 1021178116 is 6118711201.

1021178116 is an admirable number.

It is a super-3 number, since 3×1021178116³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 36470647 = 1021178116 / (1 + 0 + 2 + 1 + 1 + 7 + 8 + 1 + 1 + 6).

It is not an unprimeable number, because it can be changed into a prime (1021178111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18235296 + ... + 18235351.

Almost surely, 2^1021178116 is an apocalyptic number.

It is an amenable number.

1021178116 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1021178116 is a wasteful number, since it uses less digits than its factorization.

1021178116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36470658 (or 36470656 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 28.

The square root of 1021178116 is about 31955.8776440266. The cubic root of 1021178116 is about 1007.0101154516.

Adding to 1021178116 its reverse (6118711201), we get a palindrome (7139889317).

The spelling of 1021178116 in words is "one billion, twenty-one million, one hundred seventy-eight thousand, one hundred sixteen".