1021221041 has 2 divisors, whose sum is σ = 1021221042. Its totient is φ = 1021221040.

The previous prime is 1021220969. The next prime is 1021221073. The reversal of 1021221041 is 1401221201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 979940416 + 41280625 = 31304^2 + 6425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021221041 is a prime.

It is a super-2 number, since 2×1021221041² = 2085784829162247362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1021241041) 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 as a sum of consecutive naturals, namely, 510610520 + 510610521.

It is an arithmetic number, because the mean of its divisors is an integer number (510610521).

Almost surely, 2^1021221041 is an apocalyptic number.

It is an amenable number.

1021221041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021221041 is an equidigital number, since it uses as much as digits as its factorization.

1021221041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1021221041 is about 31956.5492661520. The cubic root of 1021221041 is about 1007.0242250710.

Adding to 1021221041 its reverse (1401221201), we get a palindrome (2422442242).

The spelling of 1021221041 in words is "one billion, twenty-one million, two hundred twenty-one thousand, forty-one".