1211748057907 has 4 divisors (see below), whose sum is σ = 1244498005456. Its totient is φ = 1178998110360.

The previous prime is 1211748057829. The next prime is 1211748057911. The reversal of 1211748057907 is 7097508471121.

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 1211748057907 - 2²⁷ = 1211613840179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211748027907) 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, 16374973719 + ... + 16374973792.

It is an arithmetic number, because the mean of its divisors is an integer number (311124501364).

Almost surely, 2^{1211748057907} is an apocalyptic number.

1211748057907 is a deficient number, since it is larger than the sum of its proper divisors (32749947549).

1211748057907 is an equidigital number, since it uses as much as digits as its factorization.

1211748057907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32749947548.

The product of its (nonzero) digits is 987840, while the sum is 52.

The spelling of 1211748057907 in words is "one trillion, two hundred eleven billion, seven hundred forty-eight million, fifty-seven thousand, nine hundred seven".