1212302221110 has 48 divisors (see below), whose sum is σ = 3152245552560. Its totient is φ = 323253948480.

The previous prime is 1212302221073. The next prime is 1212302221111. The reversal of 1212302221110 is 111222032121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212302221111) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 555265 + ... + 1653155.

It is an arithmetic number, because the mean of its divisors is an integer number (65671782345).

Almost surely, 2^{1212302221110} is an apocalyptic number.

1212302221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212302221110 is an abundant number, since it is smaller than the sum of its proper divisors (1939943331450).

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

1212302221110 is a wasteful number, since it uses less digits than its factorization.

1212302221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110173 (or 1110170 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1212302221110 its reverse (111222032121), we get a palindrome (1323524253231).

The spelling of 1212302221110 in words is "one trillion, two hundred twelve billion, three hundred two million, two hundred twenty-one thousand, one hundred ten".