2100012021019 has 4 divisors (see below), whose sum is σ = 2290922204760. Its totient is φ = 1909101837280.

The previous prime is 2100012020947. The next prime is 2100012021053. The reversal of 2100012021019 is 9101202100012.

It is a happy number.

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

It is not a de Polignac number, because 2100012021019 - 2²¹ = 2100009923867 is a prime.

It is a super-2 number, since 2×2100012021019² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100012020987 and 2100012021005.

It is not an unprimeable number, because it can be changed into a prime (2100012021059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95455091854 + ... + 95455091875.

It is an arithmetic number, because the mean of its divisors is an integer number (572730551190).

Almost surely, 2^{2100012021019} is an apocalyptic number.

2100012021019 is a deficient number, since it is larger than the sum of its proper divisors (190910183741).

2100012021019 is a wasteful number, since it uses less digits than its factorization.

2100012021019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190910183740.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 2100012021019 in words is "two trillion, one hundred billion, twelve million, twenty-one thousand, nineteen".