1101221220100 has 18 divisors (see below), whose sum is σ = 2389650047834. Its totient is φ = 440488488000.

The previous prime is 1101221220091. The next prime is 1101221220149. The reversal of 1101221220100 is 10221221011.

It can be written as a sum of positive squares in 3 ways, for example, as 207001340676 + 894219879424 = 454974^2 + 945632^2 .

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, 5506106001 + ... + 5506106200.

Almost surely, 2^{1101221220100} is an apocalyptic number.

1101221220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101221220100 is an abundant number, since it is smaller than the sum of its proper divisors (1288428827734).

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

1101221220100 is a wasteful number, since it uses less digits than its factorization.

1101221220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11012212215 (or 11012212208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1101221220100 its reverse (10221221011), we get a palindrome (1111442441111).

The spelling of 1101221220100 in words is "one trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty thousand, one hundred".