210220920001 has 4 divisors (see below), whose sum is σ = 212582952900. Its totient is φ = 207858887104.

The previous prime is 210220919983. The next prime is 210220920011. The reversal of 210220920001 is 100029022012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116018578225 + 94202341776 = 340615^2 + 306924^2 .

It is a cyclic number.

It is not a de Polignac number, because 210220920001 - 2¹⁷ = 210220788929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210220920011) 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, 1181016316 + ... + 1181016493.

It is an arithmetic number, because the mean of its divisors is an integer number (53145738225).

Almost surely, 2^210220920001 is an apocalyptic number.

It is an amenable number.

210220920001 is a deficient number, since it is larger than the sum of its proper divisors (2362032899).

210220920001 is an equidigital number, since it uses as much as digits as its factorization.

210220920001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362032898.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 210220920001 its reverse (100029022012), we get a palindrome (310249942013).

The spelling of 210220920001 in words is "two hundred ten billion, two hundred twenty million, nine hundred twenty thousand, one".