1206411321531 has 64 divisors (see below), whose sum is σ = 1762058188800. Its totient is φ = 729767522304.

The previous prime is 1206411321497. The next prime is 1206411321587. The reversal of 1206411321531 is 1351231146021.

It is not a de Polignac number, because 1206411321531 - 2²⁷ = 1206277103803 is a prime.

It is a super-2 number, since 2×1206411321531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1206411321131) 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 63 ways as a sum of consecutive naturals, for example, 638649835 + ... + 638651723.

It is an arithmetic number, because the mean of its divisors is an integer number (27532159200).

Almost surely, 2^{1206411321531} is an apocalyptic number.

1206411321531 is a deficient number, since it is larger than the sum of its proper divisors (555646867269).

1206411321531 is a wasteful number, since it uses less digits than its factorization.

1206411321531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 1206411321531 its reverse (1351231146021), we get a palindrome (2557642467552).

The spelling of 1206411321531 in words is "one trillion, two hundred six billion, four hundred eleven million, three hundred twenty-one thousand, five hundred thirty-one".