1012401021 has 8 divisors (see below), whose sum is σ = 1370015584. Its totient is φ = 664860240.

The previous prime is 1012400989. The next prime is 1012401023. The reversal of 1012401021 is 1201042101.

It is a happy number.

1012401021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1012401021 - 2⁵ = 1012400989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012400988 and 1012401006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012401023) 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, 2518210 + ... + 2518611.

It is an arithmetic number, because the mean of its divisors is an integer number (171251948).

Almost surely, 2^1012401021 is an apocalyptic number.

It is an amenable number.

1012401021 is a deficient number, since it is larger than the sum of its proper divisors (357614563).

1012401021 is an equidigital number, since it uses as much as digits as its factorization.

1012401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036891.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1012401021 is about 31818.2498104468. The cubic root of 1012401021 is about 1004.1167031661.

Adding to 1012401021 its reverse (1201042101), we get a palindrome (2213443122).

The spelling of 1012401021 in words is "one billion, twelve million, four hundred one thousand, twenty-one".