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34212101221 = 289711809493
BaseRepresentation
bin11111110111001100…
…110011110001100101
310021022022002211000001
4133313030303301211
51030031244214341
623414500021301
72320544030224
oct376714636145
9107268084001
1034212101221
1113566926021
126769691831
1332c2c19b9c
141927a10cbb
15d537e8d31
hex7f7333c65

34212101221 has 4 divisors (see below), whose sum is σ = 34223913612. Its totient is φ = 34200288832.

The previous prime is 34212101201. The next prime is 34212101237. The reversal of 34212101221 is 12210121243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12210121243 = 56873214691.

It can be written as a sum of positive squares in 2 ways, for example, as 1581652900 + 32630448321 = 39770^2 + 180639^2 .

It is a cyclic number.

It is not a de Polignac number, because 34212101221 - 219 = 34211576933 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 (34212101201) 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, 5901850 + ... + 5907643.

It is an arithmetic number, because the mean of its divisors is an integer number (8555978403).

Almost surely, 234212101221 is an apocalyptic number.

It is an amenable number.

34212101221 is a deficient number, since it is larger than the sum of its proper divisors (11812391).

34212101221 is a wasteful number, since it uses less digits than its factorization.

34212101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11812390.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 34212101221 its reverse (12210121243), we get a palindrome (46422222464).

The spelling of 34212101221 in words is "thirty-four billion, two hundred twelve million, one hundred one thousand, two hundred twenty-one".

Divisors: 1 2897 11809493 34212101221