1213210040243 has 32 divisors (see below), whose sum is σ = 1246626201600. Its totient is φ = 1180410206976.

The previous prime is 1213210040233. The next prime is 1213210040303. The reversal of 1213210040243 is 3420400123121.

It is a cyclic number.

It is not a de Polignac number, because 1213210040243 - 2³² = 1208915072947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213210040233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1197640205 + ... + 1197641217.

It is an arithmetic number, because the mean of its divisors is an integer number (38957068800).

Almost surely, 2^{1213210040243} is an apocalyptic number.

1213210040243 is a deficient number, since it is larger than the sum of its proper divisors (33416161357).

1213210040243 is a wasteful number, since it uses less digits than its factorization.

1213210040243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1213210040243 its reverse (3420400123121), we get a palindrome (4633610163364).

The spelling of 1213210040243 in words is "one trillion, two hundred thirteen billion, two hundred ten million, forty thousand, two hundred forty-three".