198201220501 has 4 divisors (see below), whose sum is σ = 198223627500. Its totient is φ = 198178813504.

The previous prime is 198201220493. The next prime is 198201220519. The reversal of 198201220501 is 105022102891.

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 110355025 + 198090865476 = 10505^2 + 445074^2 .

It is a cyclic number.

It is not a de Polignac number, because 198201220501 - 2³ = 198201220493 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 (198201220531) 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, 11190226 + ... + 11207923.

It is an arithmetic number, because the mean of its divisors is an integer number (49555906875).

Almost surely, 2^198201220501 is an apocalyptic number.

It is an amenable number.

198201220501 is a deficient number, since it is larger than the sum of its proper divisors (22406999).

198201220501 is an equidigital number, since it uses as much as digits as its factorization.

198201220501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22406998.

The product of its (nonzero) digits is 2880, while the sum is 31.

The spelling of 198201220501 in words is "one hundred ninety-eight billion, two hundred one million, two hundred twenty thousand, five hundred one".