2101305666442 has 8 divisors (see below), whose sum is σ = 3162028655556. Its totient is φ = 1047296114592.

The previous prime is 2101305666437. The next prime is 2101305666521. The reversal of 2101305666442 is 2446665031012.

It can be written as a sum of positive squares in 2 ways, for example, as 1964205053001 + 137100613441 = 1401501^2 + 370271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2101305666395 and 2101305666404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1678358533 + ... + 1678359784.

Almost surely, 2^{2101305666442} is an apocalyptic number.

2101305666442 is a deficient number, since it is larger than the sum of its proper divisors (1060722989114).

2101305666442 is a wasteful number, since it uses less digits than its factorization.

2101305666442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356718632.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 2101305666442 in words is "two trillion, one hundred one billion, three hundred five million, six hundred sixty-six thousand, four hundred forty-two".