221230302100 has 18 divisors (see below), whose sum is σ = 480069755774. Its totient is φ = 88492120800.

The previous prime is 221230302023. The next prime is 221230302127. The reversal of 221230302100 is 1203032122.

It can be written as a sum of positive squares in 3 ways, for example, as 44532816784 + 176697485316 = 211028^2 + 420354^2 .

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, 1106151411 + ... + 1106151610.

Almost surely, 2^221230302100 is an apocalyptic number.

221230302100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221230302100 is an abundant number, since it is smaller than the sum of its proper divisors (258839453674).

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

221230302100 is a wasteful number, since it uses less digits than its factorization.

221230302100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212303035 (or 2212303028 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 221230302100 its reverse (1203032122), we get a palindrome (222433334222).

The spelling of 221230302100 in words is "two hundred twenty-one billion, two hundred thirty million, three hundred two thousand, one hundred".