200420122251 has 4 divisors (see below), whose sum is σ = 267226829672. Its totient is φ = 133613414832.

The previous prime is 200420122249. The next prime is 200420122277. The reversal of 200420122251 is 152221024002.

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

It is not a de Polignac number, because 200420122251 - 2¹ = 200420122249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200420122051) 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, 33403353706 + ... + 33403353711.

It is an arithmetic number, because the mean of its divisors is an integer number (66806707418).

Almost surely, 2^200420122251 is an apocalyptic number.

200420122251 is a deficient number, since it is larger than the sum of its proper divisors (66806707421).

200420122251 is an equidigital number, since it uses as much as digits as its factorization.

200420122251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66806707420.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 200420122251 its reverse (152221024002), we get a palindrome (352641146253).

The spelling of 200420122251 in words is "two hundred billion, four hundred twenty million, one hundred twenty-two thousand, two hundred fifty-one".