1221010100110 has 16 divisors (see below), whose sum is σ = 2197831187232. Its totient is φ = 488401149600.

The previous prime is 1221010100083. The next prime is 1221010100143. The reversal of 1221010100110 is 110010101221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2467720 + ... + 2920900.

It is an arithmetic number, because the mean of its divisors is an integer number (137364449202).

Almost surely, 2^{1221010100110} is an apocalyptic number.

1221010100110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221010100110 is a deficient number, since it is larger than the sum of its proper divisors (976821087122).

1221010100110 is a wasteful number, since it uses less digits than its factorization.

1221010100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722619.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1221010100110 its reverse (110010101221), we get a palindrome (1331020201331).

The spelling of 1221010100110 in words is "one trillion, two hundred twenty-one billion, ten million, one hundred thousand, one hundred ten".