1012321231 has 4 divisors (see below), whose sum is σ = 1012583592. Its totient is φ = 1012058872.

The previous prime is 1012321207. The next prime is 1012321249. The reversal of 1012321231 is 1321232101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321232101 = 7 ⋅188747443.

It is a cyclic number.

It is not a de Polignac number, because 1012321231 - 2¹⁷ = 1012190159 is a prime.

It is a super-2 number, since 2×1012321231² = 2049588549466710722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012321031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125305 + ... + 133138.

It is an arithmetic number, because the mean of its divisors is an integer number (253145898).

Almost surely, 2^1012321231 is an apocalyptic number.

1012321231 is a deficient number, since it is larger than the sum of its proper divisors (262361).

1012321231 is an equidigital number, since it uses as much as digits as its factorization.

1012321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262360.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1012321231 is about 31816.9959455634. The cubic root of 1012321231 is about 1004.0903234427.

Adding to 1012321231 its reverse (1321232101), we get a palindrome (2333553332).

The spelling of 1012321231 in words is "one billion, twelve million, three hundred twenty-one thousand, two hundred thirty-one".