20200012021221 has 32 divisors (see below), whose sum is σ = 28472844288000. Its totient is φ = 12712426391808.

The previous prime is 20200012021207. The next prime is 20200012021243. The reversal of 20200012021221 is 12212021000202.

It is not a de Polignac number, because 20200012021221 - 2³⁰ = 20198938279397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20200012021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200012021201) 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, 11377245 + ... + 13032333.

It is an arithmetic number, because the mean of its divisors is an integer number (889776384000).

Almost surely, 2^{20200012021221} is an apocalyptic number.

It is an amenable number.

20200012021221 is a deficient number, since it is larger than the sum of its proper divisors (8272832266779).

20200012021221 is a wasteful number, since it uses less digits than its factorization.

20200012021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657433.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20200012021221 its reverse (12212021000202), we get a palindrome (32412033021423).

The spelling of 20200012021221 in words is "twenty trillion, two hundred billion, twelve million, twenty-one thousand, two hundred twenty-one".