121102200221 has 2 divisors, whose sum is σ = 121102200222. Its totient is φ = 121102200220.

The previous prime is 121102200217. The next prime is 121102200223. The reversal of 121102200221 is 122002201121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118563148900 + 2539051321 = 344330^2 + 50389^2 .

It is a cyclic number.

It is not a de Polignac number, because 121102200221 - 2² = 121102200217 is a prime.

Together with 121102200223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121102200196 and 121102200205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121102200223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551100110 + 60551100111.

It is an arithmetic number, because the mean of its divisors is an integer number (60551100111).

Almost surely, 2^121102200221 is an apocalyptic number.

It is an amenable number.

121102200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102200221 is an equidigital number, since it uses as much as digits as its factorization.

121102200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121102200221 its reverse (122002201121), we get a palindrome (243104401342).

The spelling of 121102200221 in words is "one hundred twenty-one billion, one hundred two million, two hundred thousand, two hundred twenty-one".