1213022240240 has 160 divisors (see below), whose sum is σ = 2919508764480. Its totient is φ = 468485701632.

The previous prime is 1213022240239. The next prime is 1213022240249. The reversal of 1213022240240 is 420422203121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213022240249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73610882 + ... + 73627358.

It is an arithmetic number, because the mean of its divisors is an integer number (18246929778).

Almost surely, 2^{1213022240240} is an apocalyptic number.

1213022240240 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 1213022240240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459754382240).

1213022240240 is an abundant number, since it is smaller than the sum of its proper divisors (1706486524240).

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

1213022240240 is a wasteful number, since it uses less digits than its factorization.

1213022240240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16819 (or 16813 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 1213022240240 its reverse (420422203121), we get a palindrome (1633444443361).

The spelling of 1213022240240 in words is "one trillion, two hundred thirteen billion, twenty-two million, two hundred forty thousand, two hundred forty".