20200121211 has 8 divisors (see below), whose sum is σ = 27506548224. Its totient is φ = 13180220840.

The previous prime is 20200121209. The next prime is 20200121261. The reversal of 20200121211 is 11212100202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20200121211 - 2¹ = 20200121209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20200121261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71631495 + ... + 71631776.

It is an arithmetic number, because the mean of its divisors is an integer number (3438318528).

Almost surely, 2^20200121211 is an apocalyptic number.

20200121211 is a deficient number, since it is larger than the sum of its proper divisors (7306427013).

20200121211 is a wasteful number, since it uses less digits than its factorization.

20200121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143263321.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20200121211 its reverse (11212100202), we get a palindrome (31412221413).

The spelling of 20200121211 in words is "twenty billion, two hundred million, one hundred twenty-one thousand, two hundred eleven".