1211322103331 has 4 divisors (see below), whose sum is σ = 1217664104064. Its totient is φ = 1204980102600.

The previous prime is 1211322103319. The next prime is 1211322103349. The reversal of 1211322103331 is 1333012231121.

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 1211322103331 - 2²² = 1211317909027 is a prime.

It is a super-2 number, since 2×1211322103331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211322103297 and 1211322103306.

It is not an unprimeable number, because it can be changed into a prime (1211322103351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3171000080 + ... + 3171000461.

It is an arithmetic number, because the mean of its divisors is an integer number (304416026016).

Almost surely, 2^{1211322103331} is an apocalyptic number.

1211322103331 is a deficient number, since it is larger than the sum of its proper divisors (6342000733).

1211322103331 is an equidigital number, since it uses as much as digits as its factorization.

1211322103331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342000732.

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

Adding to 1211322103331 its reverse (1333012231121), we get a palindrome (2544334334452).

The spelling of 1211322103331 in words is "one trillion, two hundred eleven billion, three hundred twenty-two million, one hundred three thousand, three hundred thirty-one".