1213442153240 has 32 divisors (see below), whose sum is σ = 2758391707680. Its totient is φ = 480372974592.

The previous prime is 1213442153167. The next prime is 1213442153309. The reversal of 1213442153240 is 423512443121.

It is a junction number, because it is equal to n+sod(n) for n = 1213442153197 and 1213442153206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156367532 + ... + 156375291.

It is an arithmetic number, because the mean of its divisors is an integer number (86199740865).

Almost surely, 2^{1213442153240} is an apocalyptic number.

1213442153240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213442153240 is an abundant number, since it is smaller than the sum of its proper divisors (1544949554440).

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

1213442153240 is a wasteful number, since it uses less digits than its factorization.

1213442153240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312742931 (or 312742927 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 1213442153240 its reverse (423512443121), we get a palindrome (1636954596361).

The spelling of 1213442153240 in words is "one trillion, two hundred thirteen billion, four hundred forty-two million, one hundred fifty-three thousand, two hundred forty".