2121020000219 has 4 divisors (see below), whose sum is σ = 2121061478400. Its totient is φ = 2120978522040.

The previous prime is 2121020000201. The next prime is 2121020000251. The reversal of 2121020000219 is 9120000201212.

It is a happy number.

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 2121020000219 - 2²⁰ = 2121018951643 is a prime.

It is a super-2 number, since 2×2121020000219² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121020000219.

It is not an unprimeable number, because it can be changed into a prime (2121020000269) 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, 20662292 + ... + 20764689.

It is an arithmetic number, because the mean of its divisors is an integer number (530265369600).

Almost surely, 2^{2121020000219} is an apocalyptic number.

2121020000219 is a deficient number, since it is larger than the sum of its proper divisors (41478181).

2121020000219 is an equidigital number, since it uses as much as digits as its factorization.

2121020000219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41478180.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 2121020000219 in words is "two trillion, one hundred twenty-one billion, twenty million, two hundred nineteen", and thus it is an aban number.