221122220100 has 36 divisors (see below), whose sum is σ = 639780291024. Its totient is φ = 58965925280.

The previous prime is 221122220057. The next prime is 221122220107. The reversal of 221122220100 is 1022221122.

221122220100 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221122220100.

It is not an unprimeable number, because it can be changed into a prime (221122220107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 368536734 + ... + 368537333.

Almost surely, 2^221122220100 is an apocalyptic number.

221122220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221122220100 is an abundant number, since it is smaller than the sum of its proper divisors (418658070924).

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

221122220100 is a wasteful number, since it uses less digits than its factorization.

221122220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737074084 (or 737074077 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221122220100 its reverse (1022221122), we get a palindrome (222144441222).

It can be divided in two parts, 2211222 and 20100, that added together give a palindrome (2231322).

The spelling of 221122220100 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, one hundred".