20212112012111 has 4 divisors (see below), whose sum is σ = 20212257352224. Its totient is φ = 20211966672000.

The previous prime is 20212112012107. The next prime is 20212112012137. The reversal of 20212112012111 is 11121021121202.

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 20212112012111 - 2² = 20212112012107 is a prime.

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 20212112012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212112012161) 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, 72461255 + ... + 72739656.

It is an arithmetic number, because the mean of its divisors is an integer number (5053064338056).

Almost surely, 2^{20212112012111} is an apocalyptic number.

20212112012111 is a deficient number, since it is larger than the sum of its proper divisors (145340113).

20212112012111 is a wasteful number, since it uses less digits than its factorization.

20212112012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145340112.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20212112012111 its reverse (11121021121202), we get a palindrome (31333133133313).

The spelling of 20212112012111 in words is "twenty trillion, two hundred twelve billion, one hundred twelve million, twelve thousand, one hundred eleven".