1231001023200 has 1152 divisors, whose sum is σ = 4587870357504. Its totient is φ = 284663808000.

The previous prime is 1231001023177. The next prime is 1231001023201. The reversal of 1231001023200 is 23201001321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1231001023200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231001023201) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4542439065 + ... + 4542439335.

It is an arithmetic number, because the mean of its divisors is an integer number (3982526352).

Almost surely, 2^{1231001023200} is an apocalyptic number.

1231001023200 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 1231001023200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2293935178752).

1231001023200 is an abundant number, since it is smaller than the sum of its proper divisors (3356869334304).

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

1231001023200 is a wasteful number, since it uses less digits than its factorization.

1231001023200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1231001023200 its reverse (23201001321), we get a palindrome (1254202024521).

The spelling of 1231001023200 in words is "one trillion, two hundred thirty-one billion, one million, twenty-three thousand, two hundred".