1221112012219 has 16 divisors (see below), whose sum is σ = 1333416332160. Its totient is φ = 1109023940160.

The previous prime is 1221112012199. The next prime is 1221112012223. The reversal of 1221112012219 is 9122102111221.

It is a cyclic number.

It is not a de Polignac number, because 1221112012219 - 2⁷ = 1221112012091 is a prime.

It is a super-2 number, since 2×1221112012219² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221112012193 and 1221112012202.

It is not an unprimeable number, because it can be changed into a prime (1221112012619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51864352 + ... + 51887890.

It is an arithmetic number, because the mean of its divisors is an integer number (83338520760).

Almost surely, 2^{1221112012219} is an apocalyptic number.

1221112012219 is a deficient number, since it is larger than the sum of its proper divisors (112304319941).

1221112012219 is a wasteful number, since it uses less digits than its factorization.

1221112012219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27930.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 1221112012219 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, twelve thousand, two hundred nineteen".