20101021109 has 8 divisors (see below), whose sum is σ = 21648463200. Its totient is φ = 18553751856.

The previous prime is 20101021103. The next prime is 20101021181. The reversal of 20101021109 is 90112010102.

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 20101021109 - 2⁴ = 20101021093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101021103) 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, 298442 + ... + 359540.

It is an arithmetic number, because the mean of its divisors is an integer number (2706057900).

Almost surely, 2^20101021109 is an apocalyptic number.

It is an amenable number.

20101021109 is a deficient number, since it is larger than the sum of its proper divisors (1547442091).

20101021109 is a wasteful number, since it uses less digits than its factorization.

20101021109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86419.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 20101021109 in words is "twenty billion, one hundred one million, twenty-one thousand, one hundred nine".