222001022100 has 144 divisors (see below), whose sum is σ = 754617326400. Its totient is φ = 49678540800.

The previous prime is 222001022057. The next prime is 222001022149. The reversal of 222001022100 is 1220100222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2544525 + ... + 2630324.

It is an arithmetic number, because the mean of its divisors is an integer number (5240398100).

Almost surely, 2^222001022100 is an apocalyptic number.

222001022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222001022100 is an abundant number, since it is smaller than the sum of its proper divisors (532616304300).

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

222001022100 is a wasteful number, since it uses less digits than its factorization.

222001022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5174890 (or 5174883 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 222001022100 its reverse (1220100222), we get a palindrome (223221122322).

The spelling of 222001022100 in words is "two hundred twenty-two billion, one million, twenty-two thousand, one hundred".