6505211212001 has 16 divisors (see below), whose sum is σ = 6896849431680. Its totient is φ = 6123302613120.

The previous prime is 6505211211943. The next prime is 6505211212009. The reversal of 6505211212001 is 1002121125056.

It is a cyclic number.

It is not a de Polignac number, because 6505211212001 - 2⁴² = 2107164700897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6505211212009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7098710 + ... + 7962543.

It is an arithmetic number, because the mean of its divisors is an integer number (431053089480).

Almost surely, 2^{6505211212001} is an apocalyptic number.

It is an amenable number.

6505211212001 is a deficient number, since it is larger than the sum of its proper divisors (391638219679).

6505211212001 is a wasteful number, since it uses less digits than its factorization.

6505211212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15061576.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 6505211212001 its reverse (1002121125056), we get a palindrome (7507332337057).

The spelling of 6505211212001 in words is "six trillion, five hundred five billion, two hundred eleven million, two hundred twelve thousand, one".