1231331101200 has 480 divisors, whose sum is σ = 4418612190720. Its totient is φ = 325671321600.

The previous prime is 1231331101183. The next prime is 1231331101219. The reversal of 1231331101200 is 21011331321.

1231331101200 is a `hidden beast` number, since 1 + 2 + 31 + 331 + 101 + 200 = 666.

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 95 ways as a sum of consecutive naturals, for example, 752186782 + ... + 752188418.

It is an arithmetic number, because the mean of its divisors is an integer number (9205442064).

Almost surely, 2^{1231331101200} is an apocalyptic number.

1231331101200 is a gapful number since it is divisible by the number (10) 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 1231331101200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2209306095360).

1231331101200 is an abundant number, since it is smaller than the sum of its proper divisors (3187281089520).

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

1231331101200 is a wasteful number, since it uses less digits than its factorization.

1231331101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192 (or 2175 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1231331101200 its reverse (21011331321), we get a palindrome (1252342432521).

The spelling of 1231331101200 in words is "one trillion, two hundred thirty-one billion, three hundred thirty-one million, one hundred one thousand, two hundred".