1220100201101 has 6 divisors (see below), whose sum is σ = 1240429743306. Its totient is φ = 1200098554800.

The previous prime is 1220100201059. The next prime is 1220100201149. The reversal of 1220100201101 is 1011020010221.

It can be written as a sum of positive squares in 3 ways, for example, as 211531925476 + 1008568275625 = 459926^2 + 1004275^2 .

It is not a de Polignac number, because 1220100201101 - 2³⁴ = 1202920331917 is a prime.

It is a super-2 number, since 2×1220100201101² (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 (1220100201191) 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 5 ways as a sum of consecutive naturals, for example, 163944170 + ... + 163951611.

It is an arithmetic number, because the mean of its divisors is an integer number (206738290551).

Almost surely, 2^{1220100201101} is an apocalyptic number.

It is an amenable number.

1220100201101 is a deficient number, since it is larger than the sum of its proper divisors (20329542205).

1220100201101 is an frugal number, since it uses more digits than its factorization.

1220100201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327895903 (or 327895842 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1220100201101 its reverse (1011020010221), we get a palindrome (2231120211322).

The spelling of 1220100201101 in words is "one trillion, two hundred twenty billion, one hundred million, two hundred one thousand, one hundred one".