1220021102101 has 4 divisors (see below), whose sum is σ = 1236733720012. Its totient is φ = 1203308484192.

The previous prime is 1220021102071. The next prime is 1220021102123. The reversal of 1220021102101 is 1012011200221.

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 539975128900 + 680045973201 = 734830^2 + 824649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220021102101 - 2²⁷ = 1219886884373 is a prime.

It is a super-2 number, since 2×1220021102101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220028102101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8356308846 + ... + 8356308991.

It is an arithmetic number, because the mean of its divisors is an integer number (309183430003).

Almost surely, 2^{1220021102101} is an apocalyptic number.

It is an amenable number.

1220021102101 is a deficient number, since it is larger than the sum of its proper divisors (16712617911).

1220021102101 is an equidigital number, since it uses as much as digits as its factorization.

1220021102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16712617910.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220021102101 its reverse (1012011200221), we get a palindrome (2232032302322).

The spelling of 1220021102101 in words is "one trillion, two hundred twenty billion, twenty-one million, one hundred two thousand, one hundred one".