1101203821872 has 1200 divisors, whose sum is σ = 4331421937920. Its totient is φ = 263464565760.

The previous prime is 1101203821867. The next prime is 1101203821877. The reversal of 1101203821872 is 2781283021011.

It is an interprime number because it is at equal distance from previous prime (1101203821867) and next prime (1101203821877).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1101203821877) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 771690823 + ... + 771692249.

Almost surely, 2^{1101203821872} is an apocalyptic number.

1101203821872 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 1101203821872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2165710968960).

1101203821872 is an abundant number, since it is smaller than the sum of its proper divisors (3230218116048).

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

1101203821872 is a wasteful number, since it uses less digits than its factorization.

1101203821872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532 (or 1506 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

Adding to 1101203821872 its reverse (2781283021011), we get a palindrome (3882486842883).

The spelling of 1101203821872 in words is "one trillion, one hundred one billion, two hundred three million, eight hundred twenty-one thousand, eight hundred seventy-two".