1121312101 has 16 divisors (see below), whose sum is σ = 1381402624. Its totient is φ = 886339584.

The previous prime is 1121312089. The next prime is 1121312107. The reversal of 1121312101 is 1012131211.

It is a happy number.

It is not a de Polignac number, because 1121312101 - 2⁵ = 1121312069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121312107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99580 + ... + 110266.

It is an arithmetic number, because the mean of its divisors is an integer number (86337664).

Almost surely, 2^1121312101 is an apocalyptic number.

It is an amenable number.

1121312101 is a deficient number, since it is larger than the sum of its proper divisors (260090523).

1121312101 is a wasteful number, since it uses less digits than its factorization.

1121312101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11860.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1121312101 is about 33485.9985814967. The cubic root of 1121312101 is about 1038.9042023872.

Adding to 1121312101 its reverse (1012131211), we get a palindrome (2133443312).

It can be divided in two parts, 112131210 and 1, that added together give a palindrome (112131211).

The spelling of 1121312101 in words is "one billion, one hundred twenty-one million, three hundred twelve thousand, one hundred one".