110202121021221 has 32 divisors (see below), whose sum is σ = 165103800983040. Its totient is φ = 72641435688000.

The previous prime is 110202121021189. The next prime is 110202121021253. The reversal of 110202121021221 is 122120121202011.

110202121021221 is a `hidden beast` number, since 1 + 10 + 202 + 1 + 210 + 21 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (110202121021189) and next prime (110202121021253).

It is not a de Polignac number, because 110202121021221 - 2⁵ = 110202121021189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 110202121021194 and 110202121021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110202121021271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25566925 + ... + 29564706.

It is an arithmetic number, because the mean of its divisors is an integer number (5159493780720).

Almost surely, 2^{110202121021221} is an apocalyptic number.

It is an amenable number.

110202121021221 is a deficient number, since it is larger than the sum of its proper divisors (54901679961819).

110202121021221 is a wasteful number, since it uses less digits than its factorization.

110202121021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55132474 (or 55132468 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 110202121021221 its reverse (122120121202011), we get a palindrome (232322242223232).

The spelling of 110202121021221 in words is "one hundred ten trillion, two hundred two billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty-one".