1221110300999 has 4 divisors (see below), whose sum is σ = 1221112518336. Its totient is φ = 1221108083664.

The previous prime is 1221110300989. The next prime is 1221110301007. The reversal of 1221110300999 is 9990030111221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1221110300999 - 2¹⁶ = 1221110235463 is a prime.

It is a super-2 number, since 2×1221110300999² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221110300989) 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, 419882 + ... + 1618184.

It is an arithmetic number, because the mean of its divisors is an integer number (305278129584).

Almost surely, 2^{1221110300999} is an apocalyptic number.

1221110300999 is a deficient number, since it is larger than the sum of its proper divisors (2217337).

1221110300999 is a wasteful number, since it uses less digits than its factorization.

1221110300999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217336.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 1221110300999 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, three hundred thousand, nine hundred ninety-nine".