1311212430203 has 16 divisors (see below), whose sum is σ = 1486591831200. Its totient is φ = 1146495202560.

The previous prime is 1311212430191. The next prime is 1311212430263. The reversal of 1311212430203 is 3020342121131.

It is a cyclic number.

It is not a de Polignac number, because 1311212430203 - 2¹² = 1311212426107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311212430263) 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, 1534103 + ... + 2230671.

It is an arithmetic number, because the mean of its divisors is an integer number (92911989450).

Almost surely, 2^{1311212430203} is an apocalyptic number.

1311212430203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1311212430203 is a deficient number, since it is larger than the sum of its proper divisors (175379400997).

1311212430203 is a wasteful number, since it uses less digits than its factorization.

1311212430203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704222.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1311212430203 its reverse (3020342121131), we get a palindrome (4331554551334).

The spelling of 1311212430203 in words is "one trillion, three hundred eleven billion, two hundred twelve million, four hundred thirty thousand, two hundred three".