111221111020009 has 32 divisors (see below), whose sum is σ = 117379672768512. Its totient is φ = 105228276120000.

The previous prime is 111221111019979. The next prime is 111221111020021. The reversal of 111221111020009 is 900020111122111.

It is a happy number.

It is not a de Polignac number, because 111221111020009 - 2⁹ = 111221111019497 is a prime.

It is a super-3 number, since 3×111221111020009³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221111020079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9059300779 + ... + 9059313055.

It is an arithmetic number, because the mean of its divisors is an integer number (3668114774016).

Almost surely, 2^{111221111020009} is an apocalyptic number.

It is an amenable number.

111221111020009 is a deficient number, since it is larger than the sum of its proper divisors (6158561748503).

111221111020009 is a wasteful number, since it uses less digits than its factorization.

111221111020009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18637.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 111221111020009 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred eleven million, twenty thousand, nine".