22110001121221 has 4 divisors (see below), whose sum is σ = 23810770438252. Its totient is φ = 20409231804192.

The previous prime is 22110001121161. The next prime is 22110001121231. The reversal of 22110001121221 is 12212110001122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2623833030625 + 19486168090596 = 1619825^2 + 4414314^2 .

It is a cyclic number.

It is not a de Polignac number, because 22110001121221 - 2¹⁷ = 22110000990149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22110001121195 and 22110001121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110001121231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850384658496 + ... + 850384658521.

It is an arithmetic number, because the mean of its divisors is an integer number (5952692609563).

Almost surely, 2^{22110001121221} is an apocalyptic number.

It is an amenable number.

22110001121221 is a deficient number, since it is larger than the sum of its proper divisors (1700769317031).

22110001121221 is a wasteful number, since it uses less digits than its factorization.

22110001121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700769317030.

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

Adding to 22110001121221 its reverse (12212110001122), we get a palindrome (34322111122343).

The spelling of 22110001121221 in words is "twenty-two trillion, one hundred ten billion, one million, one hundred twenty-one thousand, two hundred twenty-one".