1200123101112 has 128 divisors (see below), whose sum is σ = 3421660656960. Its totient is φ = 347496652800.

The previous prime is 1200123101077. The next prime is 1200123101131. The reversal of 1200123101112 is 2111013210021.

It is a junction number, because it is equal to n+sod(n) for n = 1200123101091 and 1200123101100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52503478 + ... + 52526330.

Almost surely, 2^{1200123101112} is an apocalyptic number.

1200123101112 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 1200123101112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1710830328480).

1200123101112 is an abundant number, since it is smaller than the sum of its proper divisors (2221537555848).

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

1200123101112 is a wasteful number, since it uses less digits than its factorization.

1200123101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32793 (or 32789 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1200123101112 its reverse (2111013210021), we get a palindrome (3311136311133).

The spelling of 1200123101112 in words is "one trillion, two hundred billion, one hundred twenty-three million, one hundred one thousand, one hundred twelve".