20200120122138 has 64 divisors (see below), whose sum is σ = 44264460265344. Its totient is φ = 6094665216000.

The previous prime is 20200120122137. The next prime is 20200120122211. The reversal of 20200120122138 is 83122102100202.

It is not an unprimeable number, because it can be changed into a prime (20200120122137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83560770 + ... + 83802162.

It is an arithmetic number, because the mean of its divisors is an integer number (691632191646).

Almost surely, 2^{20200120122138} is an apocalyptic number.

20200120122138 is an abundant number, since it is smaller than the sum of its proper divisors (24064340143206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20200120122138 is a wasteful number, since it uses less digits than its factorization.

20200120122138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246911.

The product of its (nonzero) digits is 768, while the sum is 24.

The spelling of 20200120122138 in words is "twenty trillion, two hundred billion, one hundred twenty million, one hundred twenty-two thousand, one hundred thirty-eight".