12111221121010 has 32 divisors (see below), whose sum is σ = 23914894766400. Its totient is φ = 4379476599360.

The previous prime is 12111221120987. The next prime is 12111221121047. The reversal of 12111221121010 is 1012112211121.

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 15 ways as a sum of consecutive naturals, for example, 307527825 + ... + 307567204.

It is an arithmetic number, because the mean of its divisors is an integer number (747340461450).

Almost surely, 2^{12111221121010} is an apocalyptic number.

12111221121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111221121010 is a deficient number, since it is larger than the sum of its proper divisors (11803673645390).

12111221121010 is a wasteful number, since it uses less digits than its factorization.

12111221121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615095226.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 12111221121010 its reverse (1012112211121), we get a palindrome (13123333332131).

The spelling of 12111221121010 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, ten".