1121215711 has 16 divisors (see below), whose sum is σ = 1398636288. Its totient is φ = 873201600.

The previous prime is 1121215633. The next prime is 1121215759. The reversal of 1121215711 is 1175121211.

It is a cyclic number.

It is not a de Polignac number, because 1121215711 - 2¹¹ = 1121213663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121215111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224916 + ... + 229846.

It is an arithmetic number, because the mean of its divisors is an integer number (87414768).

Almost surely, 2^1121215711 is an apocalyptic number.

1121215711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121215711 is a deficient number, since it is larger than the sum of its proper divisors (277420577).

1121215711 is a wasteful number, since it uses less digits than its factorization.

1121215711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7902.

The product of its digits is 140, while the sum is 22.

The square root of 1121215711 is about 33484.5592923067. The cubic root of 1121215711 is about 1038.8744328444.

Adding to 1121215711 its reverse (1175121211), we get a palindrome (2296336922).

The spelling of 1121215711 in words is "one billion, one hundred twenty-one million, two hundred fifteen thousand, seven hundred eleven".