20434421301211 has 2 divisors, whose sum is σ = 20434421301212. Its totient is φ = 20434421301210.

The previous prime is 20434421301199. The next prime is 20434421301277. The reversal of 20434421301211 is 11210312443402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20434421301211 - 2¹³ = 20434421293019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20434421301211.

It is not a weakly prime, because it can be changed into another prime (20434421311211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217210650605 + 10217210650606.

It is an arithmetic number, because the mean of its divisors is an integer number (10217210650606).

Almost surely, 2^{20434421301211} is an apocalyptic number.

20434421301211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434421301211 is an equidigital number, since it uses as much as digits as its factorization.

20434421301211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 20434421301211 its reverse (11210312443402), we get a palindrome (31644733744613).

The spelling of 20434421301211 in words is "twenty trillion, four hundred thirty-four billion, four hundred twenty-one million, three hundred one thousand, two hundred eleven".