1310212091 has 4 divisors (see below), whose sum is σ = 1338088992. Its totient is φ = 1282335192.

The previous prime is 1310212087. The next prime is 1310212129. The reversal of 1310212091 is 1902120131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1310212091 - 2² = 1310212087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1310212991) 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, 13938380 + ... + 13938473.

It is an arithmetic number, because the mean of its divisors is an integer number (334522248).

Almost surely, 2^1310212091 is an apocalyptic number.

1310212091 is a deficient number, since it is larger than the sum of its proper divisors (27876901).

1310212091 is an equidigital number, since it uses as much as digits as its factorization.

1310212091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27876900.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1310212091 is about 36196.8519487538. The cubic root of 1310212091 is about 1094.2432282069.

The spelling of 1310212091 in words is "one billion, three hundred ten million, two hundred twelve thousand, ninety-one".