1221110001219 has 8 divisors (see below), whose sum is σ = 1628259408400. Its totient is φ = 814016964096.

The previous prime is 1221110001197. The next prime is 1221110001253. The reversal of 1221110001219 is 9121000111221.

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

It is not a de Polignac number, because 1221110001219 - 2²¹ = 1221107904067 is a prime.

It is a super-2 number, since 2×1221110001219² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221110001195 and 1221110001204.

It is not an unprimeable number, because it can be changed into a prime (1221110001019) 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 7 ways as a sum of consecutive naturals, for example, 14041942 + ... + 14128635.

It is an arithmetic number, because the mean of its divisors is an integer number (203532426050).

Almost surely, 2^{1221110001219} is an apocalyptic number.

1221110001219 is a deficient number, since it is larger than the sum of its proper divisors (407149407181).

1221110001219 is a wasteful number, since it uses less digits than its factorization.

1221110001219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28185029.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 1221110001219 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, one thousand, two hundred nineteen".