210100222021 has 2 divisors, whose sum is σ = 210100222022. Its totient is φ = 210100222020.

The previous prime is 210100221977. The next prime is 210100222069. The reversal of 210100222021 is 120222001012.

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., 170062212996 + 40038009025 = 412386^2 + 200095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210100222021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210100221992 and 210100222010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210100222121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050111010 + 105050111011.

It is an arithmetic number, because the mean of its divisors is an integer number (105050111011).

Almost surely, 2^210100222021 is an apocalyptic number.

It is an amenable number.

210100222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210100222021 is an equidigital number, since it uses as much as digits as its factorization.

210100222021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210100222021 its reverse (120222001012), we get a palindrome (330322223033).

The spelling of 210100222021 in words is "two hundred ten billion, one hundred million, two hundred twenty-two thousand, twenty-one".