1213011241040 has 80 divisors (see below), whose sum is σ = 2878638255360. Its totient is φ = 475220113920.

The previous prime is 1213011241003. The next prime is 1213011241049. The reversal of 1213011241040 is 401421103121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213011241049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804962 + ... + 1753278.

It is an arithmetic number, because the mean of its divisors is an integer number (35982978192).

Almost surely, 2^{1213011241040} is an apocalyptic number.

1213011241040 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 1213011241040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439319127680).

1213011241040 is an abundant number, since it is smaller than the sum of its proper divisors (1665627014320).

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

1213011241040 is a wasteful number, since it uses less digits than its factorization.

1213011241040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948660 (or 948654 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1213011241040 its reverse (401421103121), we get a palindrome (1614432344161).

The spelling of 1213011241040 in words is "one trillion, two hundred thirteen billion, eleven million, two hundred forty-one thousand, forty".