110101001220 has 168 divisors, whose sum is σ = 396182735424. Its totient is φ = 25165919808.

The previous prime is 110101001201. The next prime is 110101001251. The reversal of 110101001220 is 22100101011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 437334 + ... + 641453.

It is an arithmetic number, because the mean of its divisors is an integer number (2358230568).

Almost surely, 2^110101001220 is an apocalyptic number.

110101001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

110101001220 is an abundant number, since it is smaller than the sum of its proper divisors (286081734204).

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

110101001220 is a wasteful number, since it uses less digits than its factorization.

110101001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078821 (or 1078804 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 110101001220 its reverse (22100101011), we get a palindrome (132201102231).

The spelling of 110101001220 in words is "one hundred ten billion, one hundred one million, one thousand, two hundred twenty".