2221121311031 has 8 divisors (see below), whose sum is σ = 2580037869984. Its totient is φ = 1872608130720.

The previous prime is 2221121310953. The next prime is 2221121311051. The reversal of 2221121311031 is 1301131211222.

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 2221121311031 - 2¹⁰ = 2221121310007 is a prime.

It is a super-2 number, since 2×2221121311031² (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 = 2221121310994 and 2221121311012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221121311051) 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, 2600844200 + ... + 2600845053.

It is an arithmetic number, because the mean of its divisors is an integer number (322504733748).

Almost surely, 2^{2221121311031} is an apocalyptic number.

2221121311031 is a deficient number, since it is larger than the sum of its proper divisors (358916558953).

2221121311031 is an equidigital number, since it uses as much as digits as its factorization.

2221121311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201689321.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 2221121311031 its reverse (1301131211222), we get a palindrome (3522252522253).

The spelling of 2221121311031 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred eleven thousand, thirty-one".