210020021153 has 2 divisors, whose sum is σ = 210020021154. Its totient is φ = 210020021152.

The previous prime is 210020021149. The next prime is 210020021221. The reversal of 210020021153 is 351120020012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189601897489 + 20418123664 = 435433^2 + 142892^2 .

It is a cyclic number.

It is not a de Polignac number, because 210020021153 - 2² = 210020021149 is a prime.

It is not a weakly prime, because it can be changed into another prime (210020021753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010010576 + 105010010577.

It is an arithmetic number, because the mean of its divisors is an integer number (105010010577).

Almost surely, 2^210020021153 is an apocalyptic number.

It is an amenable number.

210020021153 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020021153 is an equidigital number, since it uses as much as digits as its factorization.

210020021153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 210020021153 its reverse (351120020012), we get a palindrome (561140041165).

The spelling of 210020021153 in words is "two hundred ten billion, twenty million, twenty-one thousand, one hundred fifty-three".