1240221001 has 2 divisors, whose sum is σ = 1240221002. Its totient is φ = 1240221000.

The previous prime is 1240220983. The next prime is 1240221023. The reversal of 1240221001 is 1001220421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1212710976 + 27510025 = 34824^2 + 5245^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240221001 - 2⁹ = 1240220489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240221071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620110500 + 620110501.

It is an arithmetic number, because the mean of its divisors is an integer number (620110501).

Almost surely, 2^1240221001 is an apocalyptic number.

It is an amenable number.

1240221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240221001 is an equidigital number, since it uses as much as digits as its factorization.

1240221001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1240221001 is about 35216.7715868448. The cubic root of 1240221001 is about 1074.4008923500.

Adding to 1240221001 its reverse (1001220421), we get a palindrome (2241441422).

The spelling of 1240221001 in words is "one billion, two hundred forty million, two hundred twenty-one thousand, one".