1312233101 has 4 divisors (see below), whose sum is σ = 1334474400. Its totient is φ = 1289991804.

The previous prime is 1312233067. The next prime is 1312233121. The reversal of 1312233101 is 1013322131.

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: 1013322131 = 1949 ⋅519919.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312233101 is a prime.

It is a super-2 number, since 2×1312233101² = 3443911422720152402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312233101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312233121) 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, 11120561 + ... + 11120678.

It is an arithmetic number, because the mean of its divisors is an integer number (333618600).

Almost surely, 2^1312233101 is an apocalyptic number.

It is an amenable number.

1312233101 is a deficient number, since it is larger than the sum of its proper divisors (22241299).

1312233101 is an equidigital number, since it uses as much as digits as its factorization.

1312233101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22241298.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1312233101 is about 36224.7581220358. The cubic root of 1312233101 is about 1094.8055647485.

Adding to 1312233101 its reverse (1013322131), we get a palindrome (2325555232).

The spelling of 1312233101 in words is "one billion, three hundred twelve million, two hundred thirty-three thousand, one hundred one".