1211106342645 has 24 divisors (see below), whose sum is σ = 2108034489600. Its totient is φ = 643220768736.

The previous prime is 1211106342619. The next prime is 1211106342659. The reversal of 1211106342645 is 5462436011121.

1211106342645 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 1 + 0 + 6 + 3 + 4 + 2 + 645 = 666.

It is not a de Polignac number, because 1211106342645 - 2¹³ = 1211106334453 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 56293585 + ... + 56315094.

It is an arithmetic number, because the mean of its divisors is an integer number (87834770400).

Almost surely, 2^{1211106342645} is an apocalyptic number.

1211106342645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211106342645 is a deficient number, since it is larger than the sum of its proper divisors (896928146955).

1211106342645 is a wasteful number, since it uses less digits than its factorization.

1211106342645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112608929 (or 112608926 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 1211106342645 in words is "one trillion, two hundred eleven billion, one hundred six million, three hundred forty-two thousand, six hundred forty-five".