20122001210221 has 8 divisors (see below), whose sum is σ = 21306765741624. Its totient is φ = 18937360834560.

The previous prime is 20122001210183. The next prime is 20122001210279. The reversal of 20122001210221 is 12201210022102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3286728900 + 20118714481321 = 57330^2 + 4485389^2 .

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 20122001210221 - 2¹⁹ = 20122000685933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122001210195 and 20122001210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122001210281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30705150 + ... + 31353631.

It is an arithmetic number, because the mean of its divisors is an integer number (2663345717703).

Almost surely, 2^{20122001210221} is an apocalyptic number.

It is an amenable number.

20122001210221 is a deficient number, since it is larger than the sum of its proper divisors (1184764531403).

20122001210221 is a wasteful number, since it uses less digits than its factorization.

20122001210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62077871.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20122001210221 its reverse (12201210022102), we get a palindrome (32323211232323).

The spelling of 20122001210221 in words is "twenty trillion, one hundred twenty-two billion, one million, two hundred ten thousand, two hundred twenty-one".