1123012211112 has 256 divisors, whose sum is σ = 3584448000000. Its totient is φ = 322191406080.

The previous prime is 1123012211077. The next prime is 1123012211137. The reversal of 1123012211112 is 2111122103211.

It is a happy number.

It is a super-2 number, since 2×1123012211112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80213889 + ... + 80227887.

It is an arithmetic number, because the mean of its divisors is an integer number (14001750000).

Almost surely, 2^{1123012211112} is an apocalyptic number.

1123012211112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123012211112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792224000000).

1123012211112 is an abundant number, since it is smaller than the sum of its proper divisors (2461435788888).

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

1123012211112 is a wasteful number, since it uses less digits than its factorization.

1123012211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15821 (or 15811 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1123012211112 its reverse (2111122103211), we get a palindrome (3234134314323).

The spelling of 1123012211112 in words is "one trillion, one hundred twenty-three billion, twelve million, two hundred eleven thousand, one hundred twelve".