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10121421421 = 46141595279
BaseRepresentation
bin10010110110100100…
…01010001001101101
3222010101020111000001
421123102022021231
5131212040441141
64352201104301
7505550443156
oct113322121155
928111214001
1010121421421
1143243077a1
121b65788091
13c53bc1377
146c032c92d
153e3894a31
hex25b48a26d

10121421421 has 8 divisors (see below), whose sum is σ = 10147737600. Its totient is φ = 10095125040.

The previous prime is 10121421389. The next prime is 10121421433. The reversal of 10121421421 is 12412412101.

It is a happy number.

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 10121421421 - 25 = 10121421389 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 (10121421451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1914660 + ... + 1919938.

It is an arithmetic number, because the mean of its divisors is an integer number (1268467200).

Almost surely, 210121421421 is an apocalyptic number.

It is an amenable number.

10121421421 is a deficient number, since it is larger than the sum of its proper divisors (26316179).

10121421421 is an equidigital number, since it uses as much as digits as its factorization.

10121421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9899.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10121421421 its reverse (12412412101), we get a palindrome (22533833522).

The spelling of 10121421421 in words is "ten billion, one hundred twenty-one million, four hundred twenty-one thousand, four hundred twenty-one".

Divisors: 1 461 4159 5279 1917299 2433619 21955361 10121421421