1221166531514 has 8 divisors (see below), whose sum is σ = 1859089346688. Its totient is φ = 601470082620.

The previous prime is 1221166531493. The next prime is 1221166531517. The reversal of 1221166531514 is 4151356611221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1221166531517) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4556591402 + ... + 4556591669.

It is an arithmetic number, because the mean of its divisors is an integer number (232386168336).

Almost surely, 2^{1221166531514} is an apocalyptic number.

1221166531514 is a deficient number, since it is larger than the sum of its proper divisors (637922815174).

1221166531514 is an equidigital number, since it uses as much as digits as its factorization.

1221166531514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9113183140.

The product of its digits is 43200, while the sum is 38.

The spelling of 1221166531514 in words is "one trillion, two hundred twenty-one billion, one hundred sixty-six million, five hundred thirty-one thousand, five hundred fourteen".