20021210210201 has 4 divisors (see below), whose sum is σ = 20022094444752. Its totient is φ = 20020325975652.

The previous prime is 20021210210137. The next prime is 20021210210251. The reversal of 20021210210201 is 10201201212002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20021210210201 - 2⁶ = 20021210210137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021210210251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442083311 + ... + 442128596.

It is an arithmetic number, because the mean of its divisors is an integer number (5005523611188).

Almost surely, 2^{20021210210201} is an apocalyptic number.

It is an amenable number.

20021210210201 is a deficient number, since it is larger than the sum of its proper divisors (884234551).

20021210210201 is an equidigital number, since it uses as much as digits as its factorization.

20021210210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884234550.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20021210210201 its reverse (10201201212002), we get a palindrome (30222411422203).

The spelling of 20021210210201 in words is "twenty trillion, twenty-one billion, two hundred ten million, two hundred ten thousand, two hundred one".