1312222101 has 4 divisors (see below), whose sum is σ = 1749629472. Its totient is φ = 874814732.

The previous prime is 1312222069. The next prime is 1312222193. The reversal of 1312222101 is 1012222131.

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.

It is a cyclic number.

It is not a de Polignac number, because 1312222101 - 2⁵ = 1312222069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310222101) 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, 218703681 + ... + 218703686.

It is an arithmetic number, because the mean of its divisors is an integer number (437407368).

Almost surely, 2^1312222101 is an apocalyptic number.

It is an amenable number.

1312222101 is a deficient number, since it is larger than the sum of its proper divisors (437407371).

1312222101 is an equidigital number, since it uses as much as digits as its factorization.

1312222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437407370.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1312222101 is about 36224.6062918564. The cubic root of 1312222101 is about 1094.8025056134.

Adding to 1312222101 its reverse (1012222131), we get a palindrome (2324444232).

The spelling of 1312222101 in words is "one billion, three hundred twelve million, two hundred twenty-two thousand, one hundred one".