1213444345240 has 16 divisors (see below), whose sum is σ = 2730249776880. Its totient is φ = 485377738080.

The previous prime is 1213444345133. The next prime is 1213444345297. The reversal of 1213444345240 is 425434443121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213444345240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15168054276 + ... + 15168054355.

It is an arithmetic number, because the mean of its divisors is an integer number (170640611055).

Almost surely, 2^{1213444345240} is an apocalyptic number.

1213444345240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213444345240 is an abundant number, since it is smaller than the sum of its proper divisors (1516805431640).

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

1213444345240 is a wasteful number, since it uses less digits than its factorization.

1213444345240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30336108642 (or 30336108638 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 1213444345240 its reverse (425434443121), we get a palindrome (1638878788361).

The spelling of 1213444345240 in words is "one trillion, two hundred thirteen billion, four hundred forty-four million, three hundred forty-five thousand, two hundred forty".