1213262711 has 4 divisors (see below), whose sum is σ = 1225770672. Its totient is φ = 1200754752.

The previous prime is 1213262663. The next prime is 1213262723. The reversal of 1213262711 is 1172623121.

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 1213262711 - 2¹⁸ = 1213000567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213262761) 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, 6253835 + ... + 6254028.

It is an arithmetic number, because the mean of its divisors is an integer number (306442668).

Almost surely, 2^1213262711 is an apocalyptic number.

1213262711 is a deficient number, since it is larger than the sum of its proper divisors (12507961).

1213262711 is an equidigital number, since it uses as much as digits as its factorization.

1213262711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12507960.

The product of its digits is 1008, while the sum is 26.

The square root of 1213262711 is about 34831.9208629096. The cubic root of 1213262711 is about 1066.5591601395.

Adding to 1213262711 its reverse (1172623121), we get a palindrome (2385885832).

The spelling of 1213262711 in words is "one billion, two hundred thirteen million, two hundred sixty-two thousand, seven hundred eleven".