1012823821 has 8 divisors (see below), whose sum is σ = 1035154944. Its totient is φ = 990525360.

The previous prime is 1012823803. The next prime is 1012823879. The reversal of 1012823821 is 1283282101.

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 1012823821 - 2⁵ = 1012823789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012823821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012823881) 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, 60876 + ... + 75706.

It is an arithmetic number, because the mean of its divisors is an integer number (129394368).

Almost surely, 2^1012823821 is an apocalyptic number.

It is an amenable number.

1012823821 is a deficient number, since it is larger than the sum of its proper divisors (22331123).

1012823821 is a wasteful number, since it uses less digits than its factorization.

1012823821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16331.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1012823821 is about 31824.8931027270. The cubic root of 1012823821 is about 1004.2564638104.

The spelling of 1012823821 in words is "one billion, twelve million, eight hundred twenty-three thousand, eight hundred twenty-one".