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30121311229 = 171978994121
BaseRepresentation
bin11100000011010111…
…101011101111111101
32212202012120011002121
4130003113223233331
5443142023424404
621500524122541
72114301630622
oct340327535775
985665504077
1030121311229
1111857770a49
125a07696451
132ac055aaa9
14165a5c6349
15bb45dce54
hex7035ebbfd

30121311229 has 8 divisors (see below), whose sum is σ = 32055050808. Its totient is φ = 28205560320.

The previous prime is 30121311217. The next prime is 30121311239. The reversal of 30121311229 is 92211312103.

It can be written as a sum of positive squares in 4 ways, for example, as 15283635129 + 14837676100 = 123627^2 + 121810^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30121311229 - 215 = 30121278461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121311239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4493712 + ... + 4500409.

It is an arithmetic number, because the mean of its divisors is an integer number (4006881351).

Almost surely, 230121311229 is an apocalyptic number.

It is an amenable number.

30121311229 is a deficient number, since it is larger than the sum of its proper divisors (1933739579).

30121311229 is a wasteful number, since it uses less digits than its factorization.

30121311229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8994335.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 30121311229 in words is "thirty billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twenty-nine".

Divisors: 1 17 197 3349 8994121 152900057 1771841837 30121311229