1021201022009 has 8 divisors (see below), whose sum is σ = 1228512507840. Its totient is φ = 829245942576.

The previous prime is 1021201021991. The next prime is 1021201022099. The reversal of 1021201022009 is 9002201021201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1021201022009 - 2³² = 1016906054713 is a prime.

It is a super-2 number, since 2×1021201022009² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021201022099) 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, 3839101454 + ... + 3839101719.

It is an arithmetic number, because the mean of its divisors is an integer number (153564063480).

Almost surely, 2^{1021201022009} is an apocalyptic number.

1021201022009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1021201022009 is a deficient number, since it is larger than the sum of its proper divisors (207311485831).

1021201022009 is an equidigital number, since it uses as much as digits as its factorization.

1021201022009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7678203199.

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

The spelling of 1021201022009 in words is "one trillion, twenty-one billion, two hundred one million, twenty-two thousand, nine".