221200320201 has 48 divisors (see below), whose sum is σ = 353032339968. Its totient is φ = 122763513600.

The previous prime is 221200320179. The next prime is 221200320251. The reversal of 221200320201 is 102023002122.

It is a happy number.

It is not a de Polignac number, because 221200320201 - 2²⁷ = 221066102473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221200320251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1261731 + ... + 1426311.

It is an arithmetic number, because the mean of its divisors is an integer number (7354840416).

Almost surely, 2^221200320201 is an apocalyptic number.

221200320201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221200320201 is a deficient number, since it is larger than the sum of its proper divisors (131832019767).

221200320201 is a wasteful number, since it uses less digits than its factorization.

221200320201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164862 (or 164855 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 221200320201 its reverse (102023002122), we get a palindrome (323223322323).

The spelling of 221200320201 in words is "two hundred twenty-one billion, two hundred million, three hundred twenty thousand, two hundred one".