20066650121 has 12 divisors (see below), whose sum is σ = 22967067456. Its totient is φ = 17174696760.

The previous prime is 20066650103. The next prime is 20066650181. The reversal of 20066650121 is 12105666002.

It is not a de Polignac number, because 20066650121 - 2²² = 20062455817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20066650181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13106126 + ... + 13107656.

It is an arithmetic number, because the mean of its divisors is an integer number (1913922288).

Almost surely, 2^20066650121 is an apocalyptic number.

It is an amenable number.

20066650121 is a deficient number, since it is larger than the sum of its proper divisors (2900417335).

20066650121 is an frugal number, since it uses more digits than its factorization.

20066650121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292 (or 2761 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 20066650121 in words is "twenty billion, sixty-six million, six hundred fifty thousand, one hundred twenty-one".