1000012221001 has 2 divisors, whose sum is σ = 1000012221002. Its totient is φ = 1000012221000.

The previous prime is 1000012220969. The next prime is 1000012221029. The reversal of 1000012221001 is 1001222100001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 779116920976 + 220895300025 = 882676^2 + 469995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000012221001 - 2⁵ = 1000012220969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000012221031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500006110500 + 500006110501.

It is an arithmetic number, because the mean of its divisors is an integer number (500006110501).

Almost surely, 2^{1000012221001} is an apocalyptic number.

It is an amenable number.

1000012221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000012221001 is an equidigital number, since it uses as much as digits as its factorization.

1000012221001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1000012221001 its reverse (1001222100001), we get a palindrome (2001234321002).

The spelling of 1000012221001 in words is "one trillion, twelve million, two hundred twenty-one thousand, one".