1011203454400 has 168 divisors, whose sum is σ = 2535120599040. Its totient is φ = 396878576640.

The previous prime is 1011203454383. The next prime is 1011203454427. The reversal of 1011203454400 is 44543021101.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51627009 + ... + 51646591.

Almost surely, 2^{1011203454400} is an apocalyptic number.

1011203454400 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 1011203454400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1267560299520).

1011203454400 is an abundant number, since it is smaller than the sum of its proper divisors (1523917144640).

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

1011203454400 is a wasteful number, since it uses less digits than its factorization.

1011203454400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20211 (or 20196 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 1011203454400 its reverse (44543021101), we get a palindrome (1055746475501).

The spelling of 1011203454400 in words is "one trillion, eleven billion, two hundred three million, four hundred fifty-four thousand, four hundred".