1220012331243 has 16 divisors (see below), whose sum is σ = 1679479259136. Its totient is φ = 787255882560.

The previous prime is 1220012331149. The next prime is 1220012331353. The reversal of 1220012331243 is 3421332100221.

It is not a de Polignac number, because 1220012331243 - 2¹⁷ = 1220012200171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220012331143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39034771 + ... + 39066012.

It is an arithmetic number, because the mean of its divisors is an integer number (104967453696).

Almost surely, 2^{1220012331243} is an apocalyptic number.

1220012331243 is a deficient number, since it is larger than the sum of its proper divisors (459466927893).

1220012331243 is a wasteful number, since it uses less digits than its factorization.

1220012331243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78100954.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1220012331243 its reverse (3421332100221), we get a palindrome (4641344431464).

The spelling of 1220012331243 in words is "one trillion, two hundred twenty billion, twelve million, three hundred thirty-one thousand, two hundred forty-three".