1921013100011 has 8 divisors (see below), whose sum is σ = 1947823946880. Its totient is φ = 1894345244928.

The previous prime is 1921013100007. The next prime is 1921013100049. The reversal of 1921013100011 is 1100013101291.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1921013100011 - 2² = 1921013100007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1921013130011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35720891 + ... + 35774628.

It is an arithmetic number, because the mean of its divisors is an integer number (243477993360).

Almost surely, 2^{1921013100011} is an apocalyptic number.

1921013100011 is a deficient number, since it is larger than the sum of its proper divisors (26810846869).

1921013100011 is an equidigital number, since it uses as much as digits as its factorization.

1921013100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71495893.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 1921013100011 in words is "one trillion, nine hundred twenty-one billion, thirteen million, one hundred thousand, eleven".