1021201220009 has 8 divisors (see below), whose sum is σ = 1054520977920. Its totient is φ = 987905073600.

The previous prime is 1021201219981. The next prime is 1021201220021. The reversal of 1021201220009 is 9000221021201.

It is a happy number.

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

It is not a de Polignac number, because 1021201220009 - 2¹² = 1021201215913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021201220209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5814944 + ... + 5987985.

It is an arithmetic number, because the mean of its divisors is an integer number (131815122240).

Almost surely, 2^{1021201220009} is an apocalyptic number.

It is an amenable number.

1021201220009 is a deficient number, since it is larger than the sum of its proper divisors (33319757911).

1021201220009 is a wasteful number, since it uses less digits than its factorization.

1021201220009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11805751.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 1021201220009 in words is "one trillion, twenty-one billion, two hundred one million, two hundred twenty thousand, nine".