1001218401 has 40 divisors (see below), whose sum is σ = 1547529984. Its totient is φ = 644656320.

The previous prime is 1001218397. The next prime is 1001218423. The reversal of 1001218401 is 1048121001.

It is not a de Polignac number, because 1001218401 - 2² = 1001218397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001218481) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 340600 + ... + 343526.

Almost surely, 2^1001218401 is an apocalyptic number.

It is an amenable number.

1001218401 is a deficient number, since it is larger than the sum of its proper divisors (546311583).

1001218401 is a wasteful number, since it uses less digits than its factorization.

1001218401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3083 (or 3074 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 1001218401 is about 31642.0353485676. The cubic root of 1001218401 is about 1000.4059688337.

Adding to 1001218401 its reverse (1048121001), we get a palindrome (2049339402).

The spelling of 1001218401 in words is "one billion, one million, two hundred eighteen thousand, four hundred one".