21020112202111 has 8 divisors (see below), whose sum is σ = 22954647397248. Its totient is φ = 19089512991000.

The previous prime is 21020112202109. The next prime is 21020112202121. The reversal of 21020112202111 is 11120221102012.

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

It is a cyclic number.

It is not a de Polignac number, because 21020112202111 - 2¹ = 21020112202109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020112202121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983984835 + ... + 984006196.

It is an arithmetic number, because the mean of its divisors is an integer number (2869330924656).

Almost surely, 2^{21020112202111} is an apocalyptic number.

21020112202111 is a deficient number, since it is larger than the sum of its proper divisors (1934535195137).

21020112202111 is a wasteful number, since it uses less digits than its factorization.

21020112202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967992013.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21020112202111 its reverse (11120221102012), we get a palindrome (32140333304123).

The spelling of 21020112202111 in words is "twenty-one trillion, twenty billion, one hundred twelve million, two hundred two thousand, one hundred eleven".