20210122101111 has 8 divisors (see below), whose sum is σ = 26948479373040. Its totient is φ = 13472589781632.

The previous prime is 20210122101109. The next prime is 20210122101121. The reversal of 20210122101111 is 11110122101202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20210122101111 - 2¹ = 20210122101109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210122101121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206180946 + ... + 206278943.

It is an arithmetic number, because the mean of its divisors is an integer number (3368559921630).

Almost surely, 2^{20210122101111} is an apocalyptic number.

20210122101111 is a deficient number, since it is larger than the sum of its proper divisors (6738357271929).

20210122101111 is a wasteful number, since it uses less digits than its factorization.

20210122101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412476225.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20210122101111 its reverse (11110122101202), we get a palindrome (31320244202313).

Subtracting from 20210122101111 its reverse (11110122101202), we obtain a palindrome (9099999999909).

The spelling of 20210122101111 in words is "twenty trillion, two hundred ten billion, one hundred twenty-two million, one hundred one thousand, one hundred eleven".