221000002010101 has 4 divisors (see below), whose sum is σ = 221000527113952. Its totient is φ = 220999476906252.

The previous prime is 221000002009981. The next prime is 221000002010113. The reversal of 221000002010101 is 101010200000122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221000002010101 - 2⁷ = 221000002009973 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 (221000002010191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261920115 + ... + 262762528.

It is an arithmetic number, because the mean of its divisors is an integer number (55250131778488).

Almost surely, 2^{221000002010101} is an apocalyptic number.

It is an amenable number.

221000002010101 is a deficient number, since it is larger than the sum of its proper divisors (525103851).

221000002010101 is an equidigital number, since it uses as much as digits as its factorization.

221000002010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525103850.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221000002010101 its reverse (101010200000122), we get a palindrome (322010202010223).

The spelling of 221000002010101 in words is "two hundred twenty-one trillion, two million, ten thousand, one hundred one".