20003565117121 has 16 divisors (see below), whose sum is σ = 20145118694400. Its totient is φ = 19862487848448.

The previous prime is 20003565117113. The next prime is 20003565117127. The reversal of 20003565117121 is 12171156530002.

It is a cyclic number.

It is not a de Polignac number, because 20003565117121 - 2³ = 20003565117113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003565117127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1284825225 + ... + 1284840793.

It is an arithmetic number, because the mean of its divisors is an integer number (1259069918400).

Almost surely, 2^{20003565117121} is an apocalyptic number.

It is an amenable number.

20003565117121 is a deficient number, since it is larger than the sum of its proper divisors (141553577279).

20003565117121 is a wasteful number, since it uses less digits than its factorization.

20003565117121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30288.

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 20003565117121 in words is "twenty trillion, three billion, five hundred sixty-five million, one hundred seventeen thousand, one hundred twenty-one".