210101221013 has 4 divisors (see below), whose sum is σ = 210131255340. Its totient is φ = 210071186688.

The previous prime is 210101220961. The next prime is 210101221111. The reversal of 210101221013 is 310122101012.

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 36743905969 + 173357315044 = 191687^2 + 416362^2 .

It is a cyclic number.

It is not a de Polignac number, because 210101221013 - 2¹⁰ = 210101219989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101221313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15006668 + ... + 15020661.

It is an arithmetic number, because the mean of its divisors is an integer number (52532813835).

Almost surely, 2^210101221013 is an apocalyptic number.

It is an amenable number.

210101221013 is a deficient number, since it is larger than the sum of its proper divisors (30034327).

210101221013 is an equidigital number, since it uses as much as digits as its factorization.

210101221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30034326.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 210101221013 its reverse (310122101012), we get a palindrome (520223322025).

The spelling of 210101221013 in words is "two hundred ten billion, one hundred one million, two hundred twenty-one thousand, thirteen".