1122121112 has 32 divisors (see below), whose sum is σ = 2406432000. Its totient is φ = 480531744.

The previous prime is 1122121111. The next prime is 1122121129. The reversal of 1122121112 is 2111212211.

It is a super-2 number, since 2×1122121112² = 2518311579992233088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71183 + ... + 85505.

It is an arithmetic number, because the mean of its divisors is an integer number (75201000).

Almost surely, 2^1122121112 is an apocalyptic number.

It is an amenable number.

1122121112 is an abundant number, since it is smaller than the sum of its proper divisors (1284310888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1122121112 is a wasteful number, since it uses less digits than its factorization.

1122121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15735 (or 15731 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 1122121112 is about 33498.0762432710. The cubic root of 1122121112 is about 1039.1539939410.

Adding to 1122121112 its reverse (2111212211), we get a palindrome (3233333323).

The spelling of 1122121112 in words is "one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".