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20131322122 = 210065661061
BaseRepresentation
bin10010101111111010…
…111001100100001010
31220221222122010100001
4102233322321210022
5312212104301442
613125340033214
71311605262142
oct225772714412
956858563301
1020131322122
1185a06742aa
123a99b3280a
131b8a967132
14d8d90b922
157cc55b2b7
hex4afeb990a

20131322122 has 4 divisors (see below), whose sum is σ = 30196983186. Its totient is φ = 10065661060.

The previous prime is 20131322117. The next prime is 20131322147. The reversal of 20131322122 is 22122313102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17646199921 + 2485122201 = 132839^2 + 49851^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20131322122.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5032830529 + ... + 5032830532.

Almost surely, 220131322122 is an apocalyptic number.

20131322122 is a deficient number, since it is larger than the sum of its proper divisors (10065661064).

20131322122 is a wasteful number, since it uses less digits than its factorization.

20131322122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10065661063.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20131322122 its reverse (22122313102), we get a palindrome (42253635224).

The spelling of 20131322122 in words is "twenty billion, one hundred thirty-one million, three hundred twenty-two thousand, one hundred twenty-two".

Divisors: 1 2 10065661061 20131322122