1012112321 has 4 divisors (see below), whose sum is σ = 1104122544. Its totient is φ = 920102100.

The previous prime is 1012112293. The next prime is 1012112333. The reversal of 1012112321 is 1232112101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1232112101 = 11 ⋅112010191.

It is a cyclic number.

It is not a de Polignac number, because 1012112321 - 2²² = 1007918017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012112296 and 1012112305.

It is not an unprimeable number, because it can be changed into a prime (1012112341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46005095 + ... + 46005116.

It is an arithmetic number, because the mean of its divisors is an integer number (276030636).

Almost surely, 2^1012112321 is an apocalyptic number.

1012112321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012112321 is a deficient number, since it is larger than the sum of its proper divisors (92010223).

1012112321 is an equidigital number, since it uses as much as digits as its factorization.

1012112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92010222.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1012112321 is about 31813.7127823836. The cubic root of 1012112321 is about 1004.0212482210.

Adding to 1012112321 its reverse (1232112101), we get a palindrome (2244224422).

The spelling of 1012112321 in words is "one billion, twelve million, one hundred twelve thousand, three hundred twenty-one".