1212120531 has 20 divisors (see below), whose sum is σ = 1812374784. Its totient is φ = 807332400.

The previous prime is 1212120529. The next prime is 1212120577. The reversal of 1212120531 is 1350212121.

1212120531 is a `hidden beast` number, since 1 + 2 + 12 + 120 + 531 = 666.

It is not a de Polignac number, because 1212120531 - 2¹ = 1212120529 is a prime.

It is a super-2 number, since 2×1212120531² = 2938472363343443922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212120431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 89326 + ... + 101996.

Almost surely, 2^1212120531 is an apocalyptic number.

1212120531 is a deficient number, since it is larger than the sum of its proper divisors (600254253).

1212120531 is a wasteful number, since it uses less digits than its factorization.

1212120531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13864 (or 13855 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1212120531 is about 34815.5214092795. The cubic root of 1212120531 is about 1066.2243645487.

Adding to 1212120531 its reverse (1350212121), we get a palindrome (2562332652).

The spelling of 1212120531 in words is "one billion, two hundred twelve million, one hundred twenty thousand, five hundred thirty-one".