2021011210019 has 4 divisors (see below), whose sum is σ = 2021053793496. Its totient is φ = 2020968626544.

The previous prime is 2021011210003. The next prime is 2021011210109. The reversal of 2021011210019 is 9100121101202.

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 2021011210019 - 2⁴ = 2021011210003 is a prime.

It is a super-2 number, since 2×2021011210019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021011260019) 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, 21220469 + ... + 21315494.

It is an arithmetic number, because the mean of its divisors is an integer number (505263448374).

Almost surely, 2^{2021011210019} is an apocalyptic number.

2021011210019 is a deficient number, since it is larger than the sum of its proper divisors (42583477).

2021011210019 is an equidigital number, since it uses as much as digits as its factorization.

2021011210019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42583476.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 2021011210019 in words is "two trillion, twenty-one billion, eleven million, two hundred ten thousand, nineteen".