1121211751 has 32 divisors (see below), whose sum is σ = 1340375040. Its totient is φ = 927141600.

The previous prime is 1121211733. The next prime is 1121211779. The reversal of 1121211751 is 1571121211.

It is not a de Polignac number, because 1121211751 - 2⁵ = 1121211719 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 (1121211731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 461526 + ... + 463948.

It is an arithmetic number, because the mean of its divisors is an integer number (41886720).

Almost surely, 2^1121211751 is an apocalyptic number.

1121211751 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121211751 is a deficient number, since it is larger than the sum of its proper divisors (219163289).

1121211751 is a wasteful number, since it uses less digits than its factorization.

1121211751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547.

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

The square root of 1121211751 is about 33484.5001605220. The cubic root of 1121211751 is about 1038.8732097828.

Adding to 1121211751 its reverse (1571121211), we get a palindrome (2692332962).

The spelling of 1121211751 in words is "one billion, one hundred twenty-one million, two hundred eleven thousand, seven hundred fifty-one".