20122101212111 has 4 divisors (see below), whose sum is σ = 20123400014232. Its totient is φ = 20120802409992.

The previous prime is 20122101212033. The next prime is 20122101212183. The reversal of 20122101212111 is 11121210122102.

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 20122101212111 - 2³⁴ = 20104921342927 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 20122101212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122101212911) 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 3 ways as a sum of consecutive naturals, for example, 649377821 + ... + 649408806.

It is an arithmetic number, because the mean of its divisors is an integer number (5030850003558).

Almost surely, 2^{20122101212111} is an apocalyptic number.

20122101212111 is a deficient number, since it is larger than the sum of its proper divisors (1298802121).

20122101212111 is a wasteful number, since it uses less digits than its factorization.

20122101212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298802120.

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

Adding to 20122101212111 its reverse (11121210122102), we get a palindrome (31243311334213).

The spelling of 20122101212111 in words is "twenty trillion, one hundred twenty-two billion, one hundred one million, two hundred twelve thousand, one hundred eleven".