6401212101 has 24 divisors (see below), whose sum is σ = 9415101696. Its totient is φ = 4190045760.

The previous prime is 6401212073. The next prime is 6401212109. The reversal of 6401212101 is 1012121046.

6401212101 is a `hidden beast` number, since 640 + 1 + 2 + 1 + 21 + 0 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-6401212101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401212109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124666 + ... + 168356.

It is an arithmetic number, because the mean of its divisors is an integer number (392295904).

Almost surely, 2^6401212101 is an apocalyptic number.

It is an amenable number.

6401212101 is a deficient number, since it is larger than the sum of its proper divisors (3013889595).

6401212101 is a wasteful number, since it uses less digits than its factorization.

6401212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43993 (or 43990 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 6401212101 is about 80007.5752725953. The cubic root of 6401212101 is about 1856.7527359311.

Adding to 6401212101 its reverse (1012121046), we get a palindrome (7413333147).

The spelling of 6401212101 in words is "six billion, four hundred one million, two hundred twelve thousand, one hundred one".