1213211529602 has 18 divisors (see below), whose sum is σ = 1902436074147. Its totient is φ = 580214466436.

The previous prime is 1213211529589. The next prime is 1213211529641. The reversal of 1213211529602 is 2069251123121.

It can be written as a sum of positive squares in only one way, i.e., 606605764801 + 606605764801 = 778849^2 + 778849^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=778849.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35810123 + ... + 35843985.

Almost surely, 2^{1213211529602} is an apocalyptic number.

1213211529602 is a deficient number, since it is larger than the sum of its proper divisors (689224544545).

1213211529602 is an frugal number, since it uses more digits than its factorization.

1213211529602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67774 (or 33888 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 1213211529602 in words is "one trillion, two hundred thirteen billion, two hundred eleven million, five hundred twenty-nine thousand, six hundred two".