20200121202004 has 24 divisors (see below), whose sum is σ = 36008856350208. Its totient is φ = 9913152355680.

The previous prime is 20200121201971. The next prime is 20200121202017. The reversal of 20200121202004 is 40020212100202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159414667 + ... + 159541330.

It is an arithmetic number, because the mean of its divisors is an integer number (1500369014592).

Almost surely, 2^{20200121202004} is an apocalyptic number.

It is an amenable number.

20200121202004 is a deficient number, since it is larger than the sum of its proper divisors (15808735148204).

20200121202004 is a wasteful number, since it uses less digits than its factorization.

20200121202004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318956295 (or 318956293 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20200121202004 its reverse (40020212100202), we get a palindrome (60220333302206).

The spelling of 20200121202004 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, two hundred two thousand, four".