102220032181 has 2 divisors, whose sum is σ = 102220032182. Its totient is φ = 102220032180.

The previous prime is 102220032169. The next prime is 102220032217. The reversal of 102220032181 is 181230022201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90992722500 + 11227309681 = 301650^2 + 105959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102220032181 is a prime.

It is a super-2 number, since 2×102220032181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102220038181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110016090 + 51110016091.

It is an arithmetic number, because the mean of its divisors is an integer number (51110016091).

Almost surely, 2^102220032181 is an apocalyptic number.

It is an amenable number.

102220032181 is a deficient number, since it is larger than the sum of its proper divisors (1).

102220032181 is an equidigital number, since it uses as much as digits as its factorization.

102220032181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 102220032181 its reverse (181230022201), we get a palindrome (283450054382).

The spelling of 102220032181 in words is "one hundred two billion, two hundred twenty million, thirty-two thousand, one hundred eighty-one".