200421420134101 has 4 divisors (see below), whose sum is σ = 200656380768172. Its totient is φ = 200186459500032.

The previous prime is 200421420134099. The next prime is 200421420134183. The reversal of 200421420134101 is 101431024124002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 95582865669201 + 104838554464900 = 9776649^2 + 10239070^2 .

It is a cyclic number.

It is not a de Polignac number, because 200421420134101 - 2¹ = 200421420134099 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 (200421420164101) 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, 117480315756 + ... + 117480317461.

It is an arithmetic number, because the mean of its divisors is an integer number (50164095192043).

Almost surely, 2^{200421420134101} is an apocalyptic number.

It is an amenable number.

200421420134101 is a deficient number, since it is larger than the sum of its proper divisors (234960634071).

200421420134101 is an equidigital number, since it uses as much as digits as its factorization.

200421420134101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234960634070.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 200421420134101 its reverse (101431024124002), we get a palindrome (301852444258103).

The spelling of 200421420134101 in words is "two hundred trillion, four hundred twenty-one billion, four hundred twenty million, one hundred thirty-four thousand, one hundred one".