1221224101311 has 16 divisors (see below), whose sum is σ = 1699349057280. Its totient is φ = 778634883840.

The previous prime is 1221224101277. The next prime is 1221224101313. The reversal of 1221224101311 is 1131014221221.

It is not a de Polignac number, because 1221224101311 - 2⁷ = 1221224101183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221224101313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861445 + ... + 1784526.

It is an arithmetic number, because the mean of its divisors is an integer number (106209316080).

Almost surely, 2^{1221224101311} is an apocalyptic number.

1221224101311 is a deficient number, since it is larger than the sum of its proper divisors (478124955969).

1221224101311 is a wasteful number, since it uses less digits than its factorization.

1221224101311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652686.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 1221224101311 its reverse (1131014221221), we get a palindrome (2352238322532).

The spelling of 1221224101311 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-four million, one hundred one thousand, three hundred eleven".