220101220100 has 72 divisors (see below), whose sum is σ = 479882384520. Its totient is φ = 87624391680.

The previous prime is 220101220093. The next prime is 220101220121. The reversal of 220101220100 is 1022101022.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 860014276 + 219241205824 = 29326^2 + 468232^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18979904 + ... + 18991496.

Almost surely, 2^220101220100 is an apocalyptic number.

220101220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220101220100 is an abundant number, since it is smaller than the sum of its proper divisors (259781164420).

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

220101220100 is a wasteful number, since it uses less digits than its factorization.

220101220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12489 (or 12482 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220101220100 its reverse (1022101022), we get a palindrome (221123321122).

The spelling of 220101220100 in words is "two hundred twenty billion, one hundred one million, two hundred twenty thousand, one hundred".