1243202004311 has 4 divisors (see below), whose sum is σ = 1297254265392. Its totient is φ = 1189149743232.

The previous prime is 1243202004307. The next prime is 1243202004313. The reversal of 1243202004311 is 1134002023421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1243202004311 - 2² = 1243202004307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 54052261057 = 1243202004311 / (1 + 2 + 4 + 3 + 2 + 0 + 2 + 0 + 0 + 4 + 3 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243202004313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27026130506 + ... + 27026130551.

It is an arithmetic number, because the mean of its divisors is an integer number (324313566348).

Almost surely, 2^{1243202004311} is an apocalyptic number.

1243202004311 is a deficient number, since it is larger than the sum of its proper divisors (54052261081).

1243202004311 is an equidigital number, since it uses as much as digits as its factorization.

1243202004311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54052261080.

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

Adding to 1243202004311 its reverse (1134002023421), we get a palindrome (2377204027732).

The spelling of 1243202004311 in words is "one trillion, two hundred forty-three billion, two hundred two million, four thousand, three hundred eleven".