1212047523506 has 4 divisors (see below), whose sum is σ = 1818071285262. Its totient is φ = 606023761752.

The previous prime is 1212047523497. The next prime is 1212047523523. The reversal of 1212047523506 is 6053257402121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1180610460481 + 31437063025 = 1086559^2 + 177305^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212047523506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303011880875 + ... + 303011880878.

Almost surely, 2^{1212047523506} is an apocalyptic number.

1212047523506 is a deficient number, since it is larger than the sum of its proper divisors (606023761756).

1212047523506 is an equidigital number, since it uses as much as digits as its factorization.

1212047523506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606023761755.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 1212047523506 in words is "one trillion, two hundred twelve billion, forty-seven million, five hundred twenty-three thousand, five hundred six".