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20001122101 = 891931164413
BaseRepresentation
bin10010101000001010…
…001110011100110101
31220121220122021111001
4102220022032130311
5311430241401401
613104405243301
71305434506222
oct225012163465
956556567431
1020001122101
118534126084
123a62403531
131b699ab5bc
14d7a4d8949
157c0ddd601
hex4a828e735

20001122101 has 8 divisors (see below), whose sum is σ = 20330668440. Its totient is φ = 19673905152.

The previous prime is 20001122093. The next prime is 20001122171. The reversal of 20001122101 is 10122110002.

It can be written as a sum of positive squares in 4 ways, for example, as 225450225 + 19775671876 = 15015^2 + 140626^2 .

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 20001122101 - 23 = 20001122093 is a prime.

It is a super-2 number, since 2×200011221012 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001122171) 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, 565030 + ... + 599383.

It is an arithmetic number, because the mean of its divisors is an integer number (2541333555).

Almost surely, 220001122101 is an apocalyptic number.

It is an amenable number.

20001122101 is a deficient number, since it is larger than the sum of its proper divisors (329546339).

20001122101 is a wasteful number, since it uses less digits than its factorization.

20001122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164695.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20001122101 its reverse (10122110002), we get a palindrome (30123232103).

The spelling of 20001122101 in words is "twenty billion, one million, one hundred twenty-two thousand, one hundred one".

Divisors: 1 89 193 17177 1164413 103632757 224731709 20001122101