1022221312331 has 4 divisors (see below), whose sum is σ = 1025487195432. Its totient is φ = 1018955429232.

The previous prime is 1022221312313. The next prime is 1022221312381. The reversal of 1022221312331 is 1332131222201.

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 1022221312331 - 2⁶ = 1022221312267 is a prime.

It is a super-2 number, since 2×1022221312331² (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 = 1022221312297 and 1022221312306.

It is not an unprimeable number, because it can be changed into a prime (1022221312381) 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, 1632941081 + ... + 1632941706.

It is an arithmetic number, because the mean of its divisors is an integer number (256371798858).

Almost surely, 2^{1022221312331} is an apocalyptic number.

1022221312331 is a deficient number, since it is larger than the sum of its proper divisors (3265883101).

1022221312331 is an equidigital number, since it uses as much as digits as its factorization.

1022221312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265883100.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1022221312331 its reverse (1332131222201), we get a palindrome (2354352534532).

The spelling of 1022221312331 in words is "one trillion, twenty-two billion, two hundred twenty-one million, three hundred twelve thousand, three hundred thirty-one".