1212329603645 has 16 divisors (see below), whose sum is σ = 1482880591152. Its totient is φ = 951156011520.

The previous prime is 1212329603629. The next prime is 1212329603647. The reversal of 1212329603645 is 5463069232121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11039074489 + 1201290529156 = 105067^2 + 1096034^2 .

It is not a de Polignac number, because 1212329603645 - 2⁴ = 1212329603629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212329603596 and 1212329603605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212329603647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362216 + ... + 1598705.

It is an arithmetic number, because the mean of its divisors is an integer number (92680036947).

Almost surely, 2^{1212329603645} is an apocalyptic number.

It is an amenable number.

1212329603645 is a deficient number, since it is larger than the sum of its proper divisors (270550987507).

1212329603645 is a wasteful number, since it uses less digits than its factorization.

1212329603645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963312.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 1212329603645 in words is "one trillion, two hundred twelve billion, three hundred twenty-nine million, six hundred three thousand, six hundred forty-five".