221000201202100 has 18 divisors (see below), whose sum is σ = 479570436608774. Its totient is φ = 88400080480800.

The previous prime is 221000201202097. The next prime is 221000201202127. The reversal of 221000201202100 is 1202102000122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 37584697764496 + 183415503437604 = 6130636^2 + 13543098^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105001005911 + ... + 1105001006110.

Almost surely, 2^{221000201202100} is an apocalyptic number.

221000201202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000201202100 is an abundant number, since it is smaller than the sum of its proper divisors (258570235406674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221000201202100 is a wasteful number, since it uses less digits than its factorization.

221000201202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210002012035 (or 2210002012028 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221000201202100 its reverse (1202102000122), we get a palindrome (222202303202222).

The spelling of 221000201202100 in words is "two hundred twenty-one trillion, two hundred one million, two hundred two thousand, one hundred".