223121202100 has 18 divisors (see below), whose sum is σ = 484173008774. Its totient is φ = 89248480800.

The previous prime is 223121202091. The next prime is 223121202121. The reversal of 223121202100 is 1202121322.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15161489424 + 207959712676 = 123132^2 + 456026^2 .

It is a super-3 number, since 3×223121202100³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1115605911 + ... + 1115606110.

Almost surely, 2^223121202100 is an apocalyptic number.

223121202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223121202100 is an abundant number, since it is smaller than the sum of its proper divisors (261051806674).

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

223121202100 is a wasteful number, since it uses less digits than its factorization.

223121202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231212035 (or 2231212028 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 223121202100 its reverse (1202121322), we get a palindrome (224323323422).

The spelling of 223121202100 in words is "two hundred twenty-three billion, one hundred twenty-one million, two hundred two thousand, one hundred".