Search a number
-
+
21030112213 = 111911828383
BaseRepresentation
bin10011100101011111…
…100000101111010101
32000021121212101112221
4103211133200233111
5321032202042323
613354444142341
71343101001335
oct234537405725
960247771487
1021030112213
118a11a4a630
1240aab379b1
131ca1c28ba6
1410370310c5
158313e955d
hex4e57e0bd5

21030112213 has 4 divisors (see below), whose sum is σ = 22941940608. Its totient is φ = 19118283820.

The previous prime is 21030112199. The next prime is 21030112219. The reversal of 21030112213 is 31221103012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21030112213 - 213 = 21030104021 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 (21030112219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955914181 + ... + 955914202.

It is an arithmetic number, because the mean of its divisors is an integer number (5735485152).

Almost surely, 221030112213 is an apocalyptic number.

It is an amenable number.

21030112213 is a deficient number, since it is larger than the sum of its proper divisors (1911828395).

21030112213 is a wasteful number, since it uses less digits than its factorization.

21030112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911828394.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21030112213 its reverse (31221103012), we get a palindrome (52251215225).

The spelling of 21030112213 in words is "twenty-one billion, thirty million, one hundred twelve thousand, two hundred thirteen".

Divisors: 1 11 1911828383 21030112213