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BaseRepresentation
bin111001011101101010…
…1101010000100010101
3102210112002211020201200
41302323111222010111
54010211414213023
6132405023143113
711626006360152
oct1627325520425
9383462736650
10123402101013
11483752a5a54
121babb144a99
13b837c975a9
145d890dd229
1533239c5743
hex1cbb56a115

123402101013 has 6 divisors (see below), whose sum is σ = 178247479254. Its totient is φ = 82268067336.

The previous prime is 123402100973. The next prime is 123402101021. The reversal of 123402101013 is 310101204321.

123402101013 is a `hidden beast` number, since 12 + 340 + 210 + 101 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75888128484 + 47513972529 = 275478^2 + 217977^2 .

It is not a de Polignac number, because 123402101013 - 214 = 123402084629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123402100013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6855672270 + ... + 6855672287.

It is an arithmetic number, because the mean of its divisors is an integer number (29707913209).

Almost surely, 2123402101013 is an apocalyptic number.

It is an amenable number.

123402101013 is a deficient number, since it is larger than the sum of its proper divisors (54845378241).

123402101013 is a wasteful number, since it uses less digits than its factorization.

123402101013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13711344563 (or 13711344560 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123402101013 its reverse (310101204321), we get a palindrome (433503305334).

The spelling of 123402101013 in words is "one hundred twenty-three billion, four hundred two million, one hundred one thousand, thirteen".