1221010000110 has 72 divisors (see below), whose sum is σ = 3253944840120. Its totient is φ = 317661098880.

The previous prime is 1221010000087. The next prime is 1221010000187. The reversal of 1221010000110 is 110000101221.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1221010000092 and 1221010000101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3884040 + ... + 4186619.

It is an arithmetic number, because the mean of its divisors is an integer number (45193678335).

Almost surely, 2^{1221010000110} is an apocalyptic number.

1221010000110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221010000110 is an abundant number, since it is smaller than the sum of its proper divisors (2032934840010).

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

1221010000110 is a wasteful number, since it uses less digits than its factorization.

1221010000110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8070754 (or 8070710 counting only the distinct ones).

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

Adding to 1221010000110 its reverse (110000101221), we get a palindrome (1331010101331).

The spelling of 1221010000110 in words is "one trillion, two hundred twenty-one billion, ten million, one hundred ten", and thus it is an aban number.