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102021122222 = 251010561111
BaseRepresentation
bin101111100000011101…
…1101100100010101110
3100202100000201222201022
41133000323230202232
53132414401402342
6114511242414142
710241115142055
oct1370073544256
9322300658638
10102021122222
113a2a329a148
1217932801352
13980b470c56
144d1b65739c
1529c18c09d2
hex17c0eec8ae

102021122222 has 4 divisors (see below), whose sum is σ = 153031683336. Its totient is φ = 51010561110.

The previous prime is 102021122219. The next prime is 102021122227. The reversal of 102021122222 is 222221120201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-4 number, since 4×1020211222224 (a number of 45 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102021122222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021122227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505280554 + ... + 25505280557.

It is an arithmetic number, because the mean of its divisors is an integer number (38257920834).

Almost surely, 2102021122222 is an apocalyptic number.

102021122222 is a deficient number, since it is larger than the sum of its proper divisors (51010561114).

102021122222 is an equidigital number, since it uses as much as digits as its factorization.

102021122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51010561113.

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

Adding to 102021122222 its reverse (222221120201), we get a palindrome (324242242423).

The spelling of 102021122222 in words is "one hundred two billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-two".

Divisors: 1 2 51010561111 102021122222