1012403021 has 8 divisors (see below), whose sum is σ = 1196929920. Its totient is φ = 837850608.

The previous prime is 1012402981. The next prime is 1012403071. The reversal of 1012403021 is 1203042101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1012403021 - 2⁶ = 1012402957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012402987 and 1012403005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012403071) 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, 2493401 + ... + 2493806.

It is an arithmetic number, because the mean of its divisors is an integer number (149616240).

Almost surely, 2^1012403021 is an apocalyptic number.

It is an amenable number.

1012403021 is a deficient number, since it is larger than the sum of its proper divisors (184526899).

1012403021 is an equidigital number, since it uses as much as digits as its factorization.

1012403021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987243.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1012403021 is about 31818.2812389356. The cubic root of 1012403021 is about 1004.1173643771.

Adding to 1012403021 its reverse (1203042101), we get a palindrome (2215445122).

The spelling of 1012403021 in words is "one billion, twelve million, four hundred three thousand, twenty-one".