20111121211019 has 16 divisors (see below), whose sum is σ = 21055973289120. Its totient is φ = 19183042529280.

The previous prime is 20111121211009. The next prime is 20111121211021. The reversal of 20111121211019 is 91011212111102.

It is a cyclic number.

It is not a de Polignac number, because 20111121211019 - 2¹⁶ = 20111121145483 is a prime.

It is a super-2 number, since 2×20111121211019² (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 = 20111121210985 and 20111121211003.

It is not an unprimeable number, because it can be changed into a prime (20111121211009) 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 15 ways as a sum of consecutive naturals, for example, 81370409 + ... + 81617189.

It is an arithmetic number, because the mean of its divisors is an integer number (1315998330570).

Almost surely, 2^{20111121211019} is an apocalyptic number.

20111121211019 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20111121211019 is a deficient number, since it is larger than the sum of its proper divisors (944852078101).

20111121211019 is a wasteful number, since it uses less digits than its factorization.

20111121211019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280750.

The product of its (nonzero) digits is 72, while the sum is 23.

The spelling of 20111121211019 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, nineteen".