1011231123012 has 240 divisors, whose sum is σ = 2998341783360. Its totient is φ = 294494745600.

The previous prime is 1011231122959. The next prime is 1011231123029. The reversal of 1011231123012 is 2103211321101.

1011231123012 is a `hidden beast` number, since 1 + 0 + 112 + 311 + 230 + 12 = 666.

It is a super-2 number, since 2×1011231123012² (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 79 ways as a sum of consecutive naturals, for example, 9738664 + ... + 9841952.

It is an arithmetic number, because the mean of its divisors is an integer number (12493090764).

Almost surely, 2^{1011231123012} is an apocalyptic number.

1011231123012 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 1011231123012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1499170891680).

1011231123012 is an abundant number, since it is smaller than the sum of its proper divisors (1987110660348).

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

1011231123012 is a wasteful number, since it uses less digits than its factorization.

1011231123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103424 (or 103413 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1011231123012 its reverse (2103211321101), we get a palindrome (3114442444113).

The spelling of 1011231123012 in words is "one trillion, eleven billion, two hundred thirty-one million, one hundred twenty-three thousand, twelve".