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30031313121 = 32179183110181
BaseRepresentation
bin11011111110000000…
…010111100011100001
32212111221012202220100
4123332000113203201
5443001004004441
621443551133013
72112126643515
oct337600274341
985457182810
1030031313121
1111810991047
1259a1514169
132aa7a09984
14164c67a145
15bab761cb6
hex6fe0178e1

30031313121 has 24 divisors (see below), whose sum is σ = 43649012160. Its totient is φ = 19896199200.

The previous prime is 30031313119. The next prime is 30031313131. The reversal of 30031313121 is 12131313003.

It is a happy number.

30031313121 is a `hidden beast` number, since 300 + 31 + 313 + 1 + 21 = 666.

It is not a de Polignac number, because 30031313121 - 21 = 30031313119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30031313094 and 30031313103.

It is not an unprimeable number, because it can be changed into a prime (30031313131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2944651 + ... + 2954831.

It is an arithmetic number, because the mean of its divisors is an integer number (1818708840).

Almost surely, 230031313121 is an apocalyptic number.

It is an amenable number.

30031313121 is a deficient number, since it is larger than the sum of its proper divisors (13617699039).

30031313121 is a wasteful number, since it uses less digits than its factorization.

30031313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12197 (or 12194 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 30031313121 its reverse (12131313003), we get a palindrome (42162626124).

The spelling of 30031313121 in words is "thirty billion, thirty-one million, three hundred thirteen thousand, one hundred twenty-one".

Divisors: 1 3 9 179 537 1611 1831 5493 10181 16479 30543 91629 327749 983247 1822399 2949741 5467197 16401591 18641411 55924233 167772699 3336812569 10010437707 30031313121