101220221222101 has 4 divisors (see below), whose sum is σ = 101220327507532. Its totient is φ = 101220114936672.

The previous prime is 101220221222017. The next prime is 101220221222111. The reversal of 101220221222101 is 101222122022101.

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 19879122877201 + 81341098344900 = 4458601^2 + 9018930^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220221222101 - 2⁹ = 101220221221589 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 (101220221222111) 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, 51701166 + ... + 53623231.

It is an arithmetic number, because the mean of its divisors is an integer number (25305081876883).

Almost surely, 2^{101220221222101} is an apocalyptic number.

It is an amenable number.

101220221222101 is a deficient number, since it is larger than the sum of its proper divisors (106285431).

101220221222101 is an equidigital number, since it uses as much as digits as its factorization.

101220221222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106285430.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 101220221222101 its reverse (101222122022101), we get a palindrome (202442343244202).

The spelling of 101220221222101 in words is "one hundred one trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred one".