210101221243 has 2 divisors, whose sum is σ = 210101221244. Its totient is φ = 210101221242.

The previous prime is 210101221207. The next prime is 210101221249. The reversal of 210101221243 is 342122101012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210101221243 - 2¹³ = 210101213051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210101221243.

It is not a weakly prime, because it can be changed into another prime (210101221249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105050610621 + 105050610622.

It is an arithmetic number, because the mean of its divisors is an integer number (105050610622).

Almost surely, 2^210101221243 is an apocalyptic number.

210101221243 is a deficient number, since it is larger than the sum of its proper divisors (1).

210101221243 is an equidigital number, since it uses as much as digits as its factorization.

210101221243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 210101221243 its reverse (342122101012), we get a palindrome (552223322255).

The spelling of 210101221243 in words is "two hundred ten billion, one hundred one million, two hundred twenty-one thousand, two hundred forty-three".