20211222122111 has 8 divisors (see below), whose sum is σ = 20290854000000. Its totient is φ = 20131746233760.

The previous prime is 20211222122107. The next prime is 20211222122159. The reversal of 20211222122111 is 11122122211202.

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 20211222122111 - 2² = 20211222122107 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 (20211222127111) 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, 38737736 + ... + 39256013.

It is an arithmetic number, because the mean of its divisors is an integer number (2536356750000).

Almost surely, 2^{20211222122111} is an apocalyptic number.

20211222122111 is a deficient number, since it is larger than the sum of its proper divisors (79631877889).

20211222122111 is an equidigital number, since it uses as much as digits as its factorization.

20211222122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77994769.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20211222122111 its reverse (11122122211202), we get a palindrome (31333344333313).

The spelling of 20211222122111 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred eleven".