20111021001219 has 16 divisors (see below), whose sum is σ = 27027457409792. Its totient is φ = 13301231587488.

The previous prime is 20111021001209. The next prime is 20111021001223. The reversal of 20111021001219 is 91210012011102.

It is not a de Polignac number, because 20111021001219 - 2²⁰ = 20111019952643 is a prime.

It is a super-2 number, since 2×20111021001219² (a number of 27 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 = 20111021001195 and 20111021001204.

It is not an unprimeable number, because it can be changed into a prime (20111021001209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32899759 + ... + 33505464.

It is an arithmetic number, because the mean of its divisors is an integer number (1689216088112).

Almost surely, 2^{20111021001219} is an apocalyptic number.

20111021001219 is a deficient number, since it is larger than the sum of its proper divisors (6916436408573).

20111021001219 is a wasteful number, since it uses less digits than its factorization.

20111021001219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66406026.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 20111021001219 in words is "twenty trillion, one hundred eleven billion, twenty-one million, one thousand, two hundred nineteen".