102201211121 has 2 divisors, whose sum is σ = 102201211122. Its totient is φ = 102201211120.

The previous prime is 102201211111. The next prime is 102201211129. The reversal of 102201211121 is 121112102201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92392289521 + 9808921600 = 303961^2 + 99040^2 .

It is an emirp because it is prime and its reverse (121112102201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102201211121 - 2¹⁸ = 102200948977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102201211096 and 102201211105.

It is not a weakly prime, because it can be changed into another prime (102201211129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51100605560 + 51100605561.

It is an arithmetic number, because the mean of its divisors is an integer number (51100605561).

Almost surely, 2^102201211121 is an apocalyptic number.

It is an amenable number.

102201211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102201211121 is an equidigital number, since it uses as much as digits as its factorization.

102201211121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102201211121 its reverse (121112102201), we get a palindrome (223313313322).

The spelling of 102201211121 in words is "one hundred two billion, two hundred one million, two hundred eleven thousand, one hundred twenty-one".