1211002040000 has 140 divisors (see below), whose sum is σ = 3004047309648. Its totient is φ = 484214400000.

The previous prime is 1211002039967. The next prime is 1211002040009. The reversal of 1211002040000 is 402001121.

It is not an unprimeable number, because it can be changed into a prime (1211002040009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 156436130 + ... + 156443870.

Almost surely, 2^{1211002040000} is an apocalyptic number.

1211002040000 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 1211002040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1502023654824).

1211002040000 is an abundant number, since it is smaller than the sum of its proper divisors (1793045269648).

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

1211002040000 is an frugal number, since it uses more digits than its factorization.

1211002040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11684 (or 11659 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1211002040000 its reverse (402001121), we get a palindrome (1211404041121).

The spelling of 1211002040000 in words is "one trillion, two hundred eleven billion, two million, forty thousand".