1021220110009 has 32 divisors (see below), whose sum is σ = 1204956145152. Its totient is φ = 854990592000.

The previous prime is 1021220109989. The next prime is 1021220110049. The reversal of 1021220110009 is 9000110221201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1021220110009 - 2⁷ = 1021220109881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021220110049) 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, 51150789 + ... + 51170749.

It is an arithmetic number, because the mean of its divisors is an integer number (37654879536).

Almost surely, 2^{1021220110009} is an apocalyptic number.

It is an amenable number.

1021220110009 is a deficient number, since it is larger than the sum of its proper divisors (183736035143).

1021220110009 is a wasteful number, since it uses less digits than its factorization.

1021220110009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25857.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 1021220110009 in words is "one trillion, twenty-one billion, two hundred twenty million, one hundred ten thousand, nine".