2220101 has 4 divisors (see below), whose sum is σ = 2390892. Its totient is φ = 2049312.

The previous prime is 2220089. The next prime is 2220151. The reversal of 2220101 is 1010222.

It is a Cunningham number, because it is equal to 1490²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1010222 = 2 ⋅505111.

It can be written as a sum of positive squares in 2 ways, for example, as 329476 + 1890625 = 574^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220101 - 2¹⁸ = 1957957 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220151) 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, 85376 + ... + 85401.

It is an arithmetic number, because the mean of its divisors is an integer number (597723).

2^2220101 is an apocalyptic number.

It is an amenable number.

2220101 is a deficient number, since it is larger than the sum of its proper divisors (170791).

2220101 is a wasteful number, since it uses less digits than its factorization.

2220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170790.

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

The square root of 2220101 is about 1490.0003355704. Note that the first 3 decimals coincide. The cubic root of 2220101 is about 130.4540532993.

Adding to 2220101 its reverse (1010222), we get a palindrome (3230323).

The spelling of 2220101 in words is "two million, two hundred twenty thousand, one hundred one".