2101305666245 has 16 divisors (see below), whose sum is σ = 2546914164480. Its totient is φ = 1664181759744.

The previous prime is 2101305666241. The next prime is 2101305666263. The reversal of 2101305666245 is 5426665031012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2101305666245 - 2² = 2101305666241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101305666241) 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, 1742369 + ... + 2690438.

It is an arithmetic number, because the mean of its divisors is an integer number (159182135280).

Almost surely, 2^{2101305666245} is an apocalyptic number.

It is an amenable number.

2101305666245 is a deficient number, since it is larger than the sum of its proper divisors (445608498235).

2101305666245 is a wasteful number, since it uses less digits than its factorization.

2101305666245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433764.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 2101305666245 in words is "two trillion, one hundred one billion, three hundred five million, six hundred sixty-six thousand, two hundred forty-five".