1012311021 has 8 divisors (see below), whose sum is σ = 1351577440. Its totient is φ = 673959312.

The previous prime is 1012310989. The next prime is 1012311023. The reversal of 1012311021 is 1201132101.

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

It is not a de Polignac number, because 1012311021 - 2⁵ = 1012310989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012310988 and 1012311006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012311023) 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, 226090 + ... + 230523.

It is an arithmetic number, because the mean of its divisors is an integer number (168947180).

Almost surely, 2^1012311021 is an apocalyptic number.

It is an amenable number.

1012311021 is a deficient number, since it is larger than the sum of its proper divisors (339266419).

1012311021 is an equidigital number, since it uses as much as digits as its factorization.

1012311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457355.

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

The square root of 1012311021 is about 31816.8354963218. The cubic root of 1012311021 is about 1004.0869477696.

Adding to 1012311021 its reverse (1201132101), we get a palindrome (2213443122).

The spelling of 1012311021 in words is "one billion, twelve million, three hundred eleven thousand, twenty-one".