1009281920111 has 4 divisors (see below), whose sum is σ = 1009413464592. Its totient is φ = 1009150375632.

The previous prime is 1009281920089. The next prime is 1009281920117. The reversal of 1009281920111 is 1110291829001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1009281920111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009281920117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65760731 + ... + 65776076.

It is an arithmetic number, because the mean of its divisors is an integer number (252353366148).

Almost surely, 2^{1009281920111} is an apocalyptic number.

1009281920111 is a deficient number, since it is larger than the sum of its proper divisors (131544481).

1009281920111 is an equidigital number, since it uses as much as digits as its factorization.

1009281920111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131544480.

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 1009281920111 in words is "one trillion, nine billion, two hundred eighty-one million, nine hundred twenty thousand, one hundred eleven".