1213140213240 has 128 divisors (see below), whose sum is σ = 3676374673920. Its totient is φ = 320220864000.

The previous prime is 1213140213217. The next prime is 1213140213281. The reversal of 1213140213240 is 423120413121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1213140213240.

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, 60432405 + ... + 60452475.

It is an arithmetic number, because the mean of its divisors is an integer number (28721677140).

Almost surely, 2^{1213140213240} is an apocalyptic number.

1213140213240 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 1213140213240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838187336960).

1213140213240 is an abundant number, since it is smaller than the sum of its proper divisors (2463234460680).

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

1213140213240 is a wasteful number, since it uses less digits than its factorization.

1213140213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25173 (or 25169 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1213140213240 its reverse (423120413121), we get a palindrome (1636260626361).

The spelling of 1213140213240 in words is "one trillion, two hundred thirteen billion, one hundred forty million, two hundred thirteen thousand, two hundred forty".