1211143021313 has 16 divisors (see below), whose sum is σ = 1276985001600. Its totient is φ = 1146402571776.

The previous prime is 1211143021301. The next prime is 1211143021337. The reversal of 1211143021313 is 3131203411121.

It is a cyclic number.

It is not a de Polignac number, because 1211143021313 - 2¹⁰ = 1211143020289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211143011313) 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, 21561338 + ... + 21617436.

It is an arithmetic number, because the mean of its divisors is an integer number (79811562600).

Almost surely, 2^{1211143021313} is an apocalyptic number.

It is an amenable number.

1211143021313 is a deficient number, since it is larger than the sum of its proper divisors (65841980287).

1211143021313 is an equidigital number, since it uses as much as digits as its factorization.

1211143021313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65896.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1211143021313 its reverse (3131203411121), we get a palindrome (4342346432434).

The spelling of 1211143021313 in words is "one trillion, two hundred eleven billion, one hundred forty-three million, twenty-one thousand, three hundred thirteen".