1213243020243 has 12 divisors (see below), whose sum is σ = 1752473568768. Its totient is φ = 808823405520.

The previous prime is 1213243020233. The next prime is 1213243020271. The reversal of 1213243020243 is 3420203423121.

1213243020243 is a `hidden beast` number, since 1 + 21 + 3 + 2 + 430 + 202 + 4 + 3 = 666.

It is not a de Polignac number, because 1213243020243 - 2⁹ = 1213243019731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213243020233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1440373 + ... + 2121593.

It is an arithmetic number, because the mean of its divisors is an integer number (146039464064).

Almost surely, 2^{1213243020243} is an apocalyptic number.

1213243020243 is a deficient number, since it is larger than the sum of its proper divisors (539230548525).

1213243020243 is a wasteful number, since it uses less digits than its factorization.

1213243020243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879114 (or 879111 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 1213243020243 its reverse (3420203423121), we get a palindrome (4633446443364).

The spelling of 1213243020243 in words is "one trillion, two hundred thirteen billion, two hundred forty-three million, twenty thousand, two hundred forty-three".