20221111222121 has 8 divisors (see below), whose sum is σ = 22101252493824. Its totient is φ = 18417710410560.

The previous prime is 20221111222093. The next prime is 20221111222171. The reversal of 20221111222121 is 12122211112202.

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 20221111222121 - 2⁶ = 20221111222057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20221111222093 and 20221111222102.

It is not an unprimeable number, because it can be changed into a prime (20221111222171) 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, 19185114485 + ... + 19185115538.

It is an arithmetic number, because the mean of its divisors is an integer number (2762656561728).

Almost surely, 2^{20221111222121} is an apocalyptic number.

It is an amenable number.

20221111222121 is a deficient number, since it is larger than the sum of its proper divisors (1880141271703).

20221111222121 is a wasteful number, since it uses less digits than its factorization.

20221111222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38370230071.

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

Adding to 20221111222121 its reverse (12122211112202), we get a palindrome (32343322334323).

The spelling of 20221111222121 in words is "twenty trillion, two hundred twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".