1221010041331 has 2 divisors, whose sum is σ = 1221010041332. Its totient is φ = 1221010041330.

The previous prime is 1221010041311. The next prime is 1221010041371. The reversal of 1221010041331 is 1331400101221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221010041331 - 2³¹ = 1218862557683 is a prime.

It is a super-2 number, since 2×1221010041331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221010041299 and 1221010041308.

It is not a weakly prime, because it can be changed into another prime (1221010041301) 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 as a sum of consecutive naturals, namely, 610505020665 + 610505020666.

It is an arithmetic number, because the mean of its divisors is an integer number (610505020666).

Almost surely, 2^{1221010041331} is an apocalyptic number.

1221010041331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221010041331 is an equidigital number, since it uses as much as digits as its factorization.

1221010041331 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1221010041331 its reverse (1331400101221), we get a palindrome (2552410142552).

The spelling of 1221010041331 in words is "one trillion, two hundred twenty-one billion, ten million, forty-one thousand, three hundred thirty-one".