1000001920111 has 4 divisors (see below), whose sum is σ = 1000007230032. Its totient is φ = 999996610192.

The previous prime is 1000001920097. The next prime is 1000001920139. The reversal of 1000001920111 is 1110291000001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000001920111 - 2¹³ = 1000001911919 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 (1000001980111) 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, 2361670 + ... + 2752723.

It is an arithmetic number, because the mean of its divisors is an integer number (250001807508).

Almost surely, 2^{1000001920111} is an apocalyptic number.

1000001920111 is a deficient number, since it is larger than the sum of its proper divisors (5309921).

1000001920111 is an equidigital number, since it uses as much as digits as its factorization.

1000001920111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5309920.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1000001920111 its reverse (1110291000001), we get a palindrome (2110292920112).

The spelling of 1000001920111 in words is "one trillion, one million, nine hundred twenty thousand, one hundred eleven".