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21134420121 = 313735130959
BaseRepresentation
bin10011101011101101…
…011010100010011001
32000112220010210002210
4103223231122202121
5321240402420441
613413051545333
71345505415123
oct235355324231
960486123083
1021134420121
118a65913711
124119a5b249
131cba71a449
141046c24213
1583a650616
hex4ebb5a899

21134420121 has 8 divisors (see below), whose sum is σ = 28199756160. Its totient is φ = 14079348752.

The previous prime is 21134420089. The next prime is 21134420129. The reversal of 21134420121 is 12102443112.

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 21134420121 - 25 = 21134420089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21134420129) 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 7 ways as a sum of consecutive naturals, for example, 2561361 + ... + 2569598.

It is an arithmetic number, because the mean of its divisors is an integer number (3524969520).

Almost surely, 221134420121 is an apocalyptic number.

It is an amenable number.

21134420121 is a deficient number, since it is larger than the sum of its proper divisors (7065336039).

21134420121 is a wasteful number, since it uses less digits than its factorization.

21134420121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132335.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21134420121 its reverse (12102443112), we get a palindrome (33236863233).

The spelling of 21134420121 in words is "twenty-one billion, one hundred thirty-four million, four hundred twenty thousand, one hundred twenty-one".

Divisors: 1 3 1373 4119 5130959 15392877 7044806707 21134420121