221012111002101 has 4 divisors (see below), whose sum is σ = 294682814669472. Its totient is φ = 147341407334732.

The previous prime is 221012111002069. The next prime is 221012111002121. The reversal of 221012111002101 is 101200111210122.

It is a happy number.

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 221012111002101 - 2⁵ = 221012111002069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012111002121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36835351833681 + ... + 36835351833686.

It is an arithmetic number, because the mean of its divisors is an integer number (73670703667368).

Almost surely, 2^{221012111002101} is an apocalyptic number.

It is an amenable number.

221012111002101 is a deficient number, since it is larger than the sum of its proper divisors (73670703667371).

221012111002101 is an equidigital number, since it uses as much as digits as its factorization.

221012111002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73670703667370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221012111002101 its reverse (101200111210122), we get a palindrome (322212222212223).

The spelling of 221012111002101 in words is "two hundred twenty-one trillion, twelve billion, one hundred eleven million, two thousand, one hundred one".