1021021021009 has 8 divisors (see below), whose sum is σ = 1114131752352. Its totient is φ = 927958729440.

The previous prime is 1021021020991. The next prime is 1021021021021. The reversal of 1021021021009 is 9001201201201.

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 1021021021009 - 2⁹ = 1021021020497 is a prime.

It is a super-3 number, since 3×1021021021009³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021021021409) 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, 12065859 + ... + 12150184.

It is an arithmetic number, because the mean of its divisors is an integer number (139266469044).

Almost surely, 2^{1021021021009} is an apocalyptic number.

It is an amenable number.

1021021021009 is a deficient number, since it is larger than the sum of its proper divisors (93110731343).

1021021021009 is a wasteful number, since it uses less digits than its factorization.

1021021021009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24219887.

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

The spelling of 1021021021009 in words is "one trillion, twenty-one billion, twenty-one million, twenty-one thousand, nine".