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31212421213 = 149311673567
BaseRepresentation
bin11101000100011001…
…111100000001011101
32222120020200021121111
4131010121330001131
51002410334434323
622201102302021
72153321126401
oct350431740135
988506607544
1031212421213
1112267664036
126070b87911
132c356181bc
14172148d101
15c2a2b9c0d
hex74467c05d

31212421213 has 8 divisors (see below), whose sum is σ = 31522982400. Its totient is φ = 30903208080.

The previous prime is 31212421199. The next prime is 31212421241.

31212421213 is nontrivially palindromic in base 10.

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 31212421213 - 225 = 31178866781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31216421213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290445 + ... + 383122.

It is an arithmetic number, because the mean of its divisors is an integer number (3940372800).

Almost surely, 231212421213 is an apocalyptic number.

It is an amenable number.

31212421213 is a deficient number, since it is larger than the sum of its proper divisors (310561187).

31212421213 is a wasteful number, since it uses less digits than its factorization.

31212421213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674027.

The product of its digits is 576, while the sum is 22.

The spelling of 31212421213 in words is "thirty-one billion, two hundred twelve million, four hundred twenty-one thousand, two hundred thirteen".

Divisors: 1 149 311 46339 673567 100361483 209479337 31212421213