20200212211221 has 40 divisors (see below), whose sum is σ = 35137116710784. Its totient is φ = 11325186344160.

The previous prime is 20200212211217. The next prime is 20200212211229. The reversal of 20200212211221 is 12211221200202.

It is a happy number.

20200212211221 is a `hidden beast` number, since 2 + 0 + 20 + 0 + 212 + 211 + 221 = 666.

It is not a de Polignac number, because 20200212211221 - 2² = 20200212211217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20200212211194 and 20200212211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200212211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 336068785 + ... + 336128886.

Almost surely, 2^{20200212211221} is an apocalyptic number.

20200212211221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20200212211221 is a deficient number, since it is larger than the sum of its proper divisors (14936904499563).

20200212211221 is an equidigital number, since it uses as much as digits as its factorization.

20200212211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672197743 (or 672197734 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20200212211221 its reverse (12211221200202), we get a palindrome (32411433411423).

The spelling of 20200212211221 in words is "twenty trillion, two hundred billion, two hundred twelve million, two hundred eleven thousand, two hundred twenty-one".