2220100111021 has 4 divisors (see below), whose sum is σ = 2390877042652. Its totient is φ = 2049323179392.

The previous prime is 2220100111013. The next prime is 2220100111039. The reversal of 2220100111021 is 1201110010222.

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 315603509796 + 1904496601225 = 561786^2 + 1380035^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220100111021 - 2³ = 2220100111013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 170776931617 = 2220100111021 / (2 + 2 + 2 + 0 + 1 + 0 + 0 + 1 + 1 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220100110992 and 2220100111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220100111001) 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, 85388465796 + ... + 85388465821.

It is an arithmetic number, because the mean of its divisors is an integer number (597719260663).

Almost surely, 2^{2220100111021} is an apocalyptic number.

It is an amenable number.

2220100111021 is a deficient number, since it is larger than the sum of its proper divisors (170776931631).

2220100111021 is a wasteful number, since it uses less digits than its factorization.

2220100111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170776931630.

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

Adding to 2220100111021 its reverse (1201110010222), we get a palindrome (3421210121243).

The spelling of 2220100111021 in words is "two trillion, two hundred twenty billion, one hundred million, one hundred eleven thousand, twenty-one".