1001424121 has 2 divisors, whose sum is σ = 1001424122. Its totient is φ = 1001424120.

The previous prime is 1001424113. The next prime is 1001424131. The reversal of 1001424121 is 1214241001.

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., 621953721 + 379470400 = 24939^2 + 19480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001424121 - 2³ = 1001424113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001424095 and 1001424104.

It is not a weakly prime, because it can be changed into another prime (1001424131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500712060 + 500712061.

It is an arithmetic number, because the mean of its divisors is an integer number (500712061).

Almost surely, 2^1001424121 is an apocalyptic number.

It is an amenable number.

1001424121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001424121 is an equidigital number, since it uses as much as digits as its factorization.

1001424121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1001424121 is about 31645.2859206549. The cubic root of 1001424121 is about 1000.4744818314.

Adding to 1001424121 its reverse (1214241001), we get a palindrome (2215665122).

The spelling of 1001424121 in words is "one billion, one million, four hundred twenty-four thousand, one hundred twenty-one".