20121111102019 has 16 divisors (see below), whose sum is σ = 22094312094720. Its totient is φ = 18238901094400.

The previous prime is 20121111102007. The next prime is 20121111102031. The reversal of 20121111102019 is 91020111112102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20121111102007) and next prime (20121111102031).

It is a cyclic number.

It is not a de Polignac number, because 20121111102019 - 2¹³ = 20121111093827 is a prime.

It is a super-2 number, since 2×20121111102019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121111102619) 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, 50692099 + ... + 51087484.

It is an arithmetic number, because the mean of its divisors is an integer number (1380894505920).

Almost surely, 2^{20121111102019} is an apocalyptic number.

20121111102019 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20121111102019 is a deficient number, since it is larger than the sum of its proper divisors (1973200992701).

20121111102019 is a wasteful number, since it uses less digits than its factorization.

20121111102019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101780030.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 20121111102019 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred two thousand, nineteen".