102221121221210 has 8 divisors (see below), whose sum is σ = 183998018198196. Its totient is φ = 40888448488480.

The previous prime is 102221121221207. The next prime is 102221121221231. The reversal of 102221121221210 is 12122121122201.

It can be written as a sum of positive squares in 2 ways, for example, as 95252466309169 + 6968654912041 = 9759737^2 + 2639821^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5111056061051 + ... + 5111056061070.

Almost surely, 2^{102221121221210} is an apocalyptic number.

102221121221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102221121221210 is a deficient number, since it is larger than the sum of its proper divisors (81776896976986).

102221121221210 is a wasteful number, since it uses less digits than its factorization.

102221121221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10222112122128.

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

Adding to 102221121221210 its reverse (12122121122201), we get a palindrome (114343242343411).

Subtracting from 102221121221210 its reverse (12122121122201), we obtain a palindrome (90099000099009).

The spelling of 102221121221210 in words is "one hundred two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred ten".