1221113202031 has 8 divisors (see below), whose sum is σ = 1228800713264. Its totient is φ = 1213428081600.

The previous prime is 1221113202013. The next prime is 1221113202037. The reversal of 1221113202031 is 1302023111221.

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 1221113202031 - 2¹⁷ = 1221113070959 is a prime.

It is a super-2 number, since 2×1221113202031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221113202037) 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 7 ways as a sum of consecutive naturals, for example, 432595 + ... + 1621531.

It is an arithmetic number, because the mean of its divisors is an integer number (153600089158).

Almost surely, 2^{1221113202031} is an apocalyptic number.

1221113202031 is a deficient number, since it is larger than the sum of its proper divisors (7687511233).

1221113202031 is a wasteful number, since it uses less digits than its factorization.

1221113202031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195401.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1221113202031 its reverse (1302023111221), we get a palindrome (2523136313252).

The spelling of 1221113202031 in words is "one trillion, two hundred twenty-one billion, one hundred thirteen million, two hundred two thousand, thirty-one".