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102222012221 = 771712728859
BaseRepresentation
bin101111100110011101…
…0000001111100111101
3100202212000202020222122
41133030322001330331
53133322313342341
6114543220252325
710246104524150
oct1371472017475
9322760666878
10102222012221
113a39672a83a
1217989b410a5
139840c7a384
144d3a1cbc97
1529d435394b
hex17cce81f3d

102222012221 has 16 divisors (see below), whose sum is σ = 118491310080. Its totient is φ = 86369685360.

The previous prime is 102222012203. The next prime is 102222012229. The reversal of 102222012221 is 122210222201.

It is a happy number.

It is not a de Polignac number, because 102222012221 - 210 = 102222011197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102222012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102222012229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3527690 + ... + 3556548.

It is an arithmetic number, because the mean of its divisors is an integer number (7405706880).

Almost surely, 2102222012221 is an apocalyptic number.

It is an amenable number.

102222012221 is a deficient number, since it is larger than the sum of its proper divisors (16269297859).

102222012221 is an equidigital number, since it uses as much as digits as its factorization.

102222012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36064.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102222012221 its reverse (122210222201), we get a palindrome (224432234422).

The spelling of 102222012221 in words is "one hundred two billion, two hundred twenty-two million, twelve thousand, two hundred twenty-one".

Divisors: 1 7 71 497 7127 28859 49889 202013 506017 2048989 3542119 14342923 205678093 1439746651 14603144603 102222012221