1213200131440 has 80 divisors (see below), whose sum is σ = 3080726008416. Its totient is φ = 440646220800.

The previous prime is 1213200131411. The next prime is 1213200131447. The reversal of 1213200131440 is 441310023121.

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 (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213200131447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57471 + ... + 1558750.

Almost surely, 2^{1213200131440} is an apocalyptic number.

1213200131440 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 1213200131440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1540363004208).

1213200131440 is an abundant number, since it is smaller than the sum of its proper divisors (1867525876976).

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

1213200131440 is a wasteful number, since it uses less digits than its factorization.

1213200131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617098 (or 1617092 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1213200131440 its reverse (441310023121), we get a palindrome (1654510154561).

The spelling of 1213200131440 in words is "one trillion, two hundred thirteen billion, two hundred million, one hundred thirty-one thousand, four hundred forty".