1211011003200 has 168 divisors, whose sum is σ = 3977232360480. Its totient is φ = 322602444800.

The previous prime is 1211011003187. The next prime is 1211011003211. The reversal of 1211011003200 is 23001101121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4530886 + ... + 4790714.

Almost surely, 2^{1211011003200} is an apocalyptic number.

1211011003200 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 1211011003200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1988616180240).

1211011003200 is an abundant number, since it is smaller than the sum of its proper divisors (2766221357280).

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

1211011003200 is a wasteful number, since it uses less digits than its factorization.

1211011003200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260825 (or 260810 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 1211011003200 its reverse (23001101121), we get a palindrome (1234012104321).

The spelling of 1211011003200 in words is "one trillion, two hundred eleven billion, eleven million, three thousand, two hundred".