1243220440124 has 48 divisors (see below), whose sum is σ = 2408540621760. Its totient is φ = 557962836480.

The previous prime is 1243220440109. The next prime is 1243220440153. The reversal of 1243220440124 is 4210440223421.

It is a happy number.

It is a super-2 number, since 2×1243220440124² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2036879 + ... + 2575910.

It is an arithmetic number, because the mean of its divisors is an integer number (50177929620).

Almost surely, 2^{1243220440124} is an apocalyptic number.

It is an amenable number.

1243220440124 is a deficient number, since it is larger than the sum of its proper divisors (1165320181636).

1243220440124 is a wasteful number, since it uses less digits than its factorization.

1243220440124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612950 (or 4612948 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 1243220440124 its reverse (4210440223421), we get a palindrome (5453660663545).

The spelling of 1243220440124 in words is "one trillion, two hundred forty-three billion, two hundred twenty million, four hundred forty thousand, one hundred twenty-four".