Search a number
BaseRepresentation
bin1100001011111…
…00010100001111
321010100100221121
412011330110033
5202132033241
614050541411
72350602421
oct605742417
9233310847
10102221071
1152779227
122a297867
1318240754
14d80c811
hex617c50f

102221071 has 2 divisors, whose sum is σ = 102221072. Its totient is φ = 102221070.

The previous prime is 102220997. The next prime is 102221087. The reversal of 102221071 is 170122201.

It is an a-pointer prime, because the next prime (102221087) can be obtained adding 102221071 to its sum of digits (16).

It is a strong prime.

It is an emirp because it is prime and its reverse (170122201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102221071 - 225 = 68666639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102224071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110535 + 51110536.

It is an arithmetic number, because the mean of its divisors is an integer number (51110536).

Almost surely, 2102221071 is an apocalyptic number.

102221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

102221071 is an equidigital number, since it uses as much as digits as its factorization.

102221071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 102221071 is about 10110.4436598994. The cubic root of 102221071 is about 467.5701836351.

Adding to 102221071 its reverse (170122201), we get a palindrome (272343272).

The spelling of 102221071 in words is "one hundred two million, two hundred twenty-one thousand, seventy-one".