1221324110331 has 16 divisors (see below), whose sum is σ = 1756263833856. Its totient is φ = 750483635616.

The previous prime is 1221324110299. The next prime is 1221324110351. The reversal of 1221324110331 is 1330114231221.

It is not a de Polignac number, because 1221324110331 - 2⁵ = 1221324110299 is a prime.

It is a super-2 number, since 2×1221324110331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221324110351) 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, 22898695 + ... + 22951968.

It is an arithmetic number, because the mean of its divisors is an integer number (109766489616).

Almost surely, 2^{1221324110331} is an apocalyptic number.

1221324110331 is a deficient number, since it is larger than the sum of its proper divisors (534939723525).

1221324110331 is a wasteful number, since it uses less digits than its factorization.

1221324110331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45851362.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1221324110331 its reverse (1330114231221), we get a palindrome (2551438341552).

The spelling of 1221324110331 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-four million, one hundred ten thousand, three hundred thirty-one".