1211323213103 has 8 divisors (see below), whose sum is σ = 1265147471760. Its totient is φ = 1158608733120.

The previous prime is 1211323213081. The next prime is 1211323213117. The reversal of 1211323213103 is 3013123231121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211323213103 - 2¹⁰ = 1211323212079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211323213153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277442438 + ... + 277446803.

It is an arithmetic number, because the mean of its divisors is an integer number (158143433970).

Almost surely, 2^{1211323213103} is an apocalyptic number.

1211323213103 is a deficient number, since it is larger than the sum of its proper divisors (53824258657).

1211323213103 is an equidigital number, since it uses as much as digits as its factorization.

1211323213103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554889337.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1211323213103 its reverse (3013123231121), we get a palindrome (4224446444224).

The spelling of 1211323213103 in words is "one trillion, two hundred eleven billion, three hundred twenty-three million, two hundred thirteen thousand, one hundred three".