1121211016 has 16 divisors (see below), whose sum is σ = 2113888140. Its totient is φ = 557507520.

The previous prime is 1121210983. The next prime is 1121211017. The reversal of 1121211016 is 6101121211.

It can be written as a sum of positive squares in 2 ways, for example, as 753722116 + 367488900 = 27454^2 + 19170^2 .

It is a super-2 number, since 2×1121211016² = 2514228284799504512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121211017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385711 + ... + 388606.

Almost surely, 2^1121211016 is an apocalyptic number.

It is an amenable number.

1121211016 is a deficient number, since it is larger than the sum of its proper divisors (992677124).

1121211016 is a wasteful number, since it uses less digits than its factorization.

1121211016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774504 (or 774500 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

The square root of 1121211016 is about 33484.4891852929. The cubic root of 1121211016 is about 1038.8729827749.

Adding to 1121211016 its reverse (6101121211), we get a palindrome (7222332227).

The spelling of 1121211016 in words is "one billion, one hundred twenty-one million, two hundred eleven thousand, sixteen".