1221101012110 has 16 divisors (see below), whose sum is σ = 2511979225056. Its totient is φ = 418663204128.

The previous prime is 1221101012107. The next prime is 1221101012221. The reversal of 1221101012110 is 112101011221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8722150017 + ... + 8722150156.

It is an arithmetic number, because the mean of its divisors is an integer number (156998701566).

Almost surely, 2^{1221101012110} is an apocalyptic number.

1221101012110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221101012110 is an abundant number, since it is smaller than the sum of its proper divisors (1290878212946).

1221101012110 is a wasteful number, since it uses less digits than its factorization.

1221101012110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17444300187.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1221101012110 its reverse (112101011221), we get a palindrome (1333202023331).

The spelling of 1221101012110 in words is "one trillion, two hundred twenty-one billion, one hundred one million, twelve thousand, one hundred ten".