1203211311000 has 128 divisors (see below), whose sum is σ = 3757749278400. Its totient is φ = 320537548800.

The previous prime is 1203211310989. The next prime is 1203211311011. The reversal of 1203211311000 is 1131123021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1203211310989) and next prime (1203211311011).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2828254 + ... + 3225746.

Almost surely, 2^{1203211311000} is an apocalyptic number.

1203211311000 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 1203211311000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878874639200).

1203211311000 is an abundant number, since it is smaller than the sum of its proper divisors (2554537967400).

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

1203211311000 is a wasteful number, since it uses less digits than its factorization.

1203211311000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398526 (or 398512 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1203211311000 its reverse (1131123021), we get a palindrome (1204342434021).

The spelling of 1203211311000 in words is "one trillion, two hundred three billion, two hundred eleven million, three hundred eleven thousand".