220220110021 has 4 divisors (see below), whose sum is σ = 220221461772. Its totient is φ = 220218758272.

The previous prime is 220220109911. The next prime is 220220110031. The reversal of 220220110021 is 120011022022.

It is a happy number.

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 103999800100 + 116220309921 = 322490^2 + 340911^2 .

It is a cyclic number.

It is not a de Polignac number, because 220220110021 - 2⁹ = 220220109509 is a prime.

It is a super-2 number, since 2×220220110021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220109983 and 220220110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220220110031) 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, 391666 + ... + 770611.

It is an arithmetic number, because the mean of its divisors is an integer number (55055365443).

Almost surely, 2^220220110021 is an apocalyptic number.

It is an amenable number.

220220110021 is a deficient number, since it is larger than the sum of its proper divisors (1351751).

220220110021 is a wasteful number, since it uses less digits than its factorization.

220220110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351750.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 220220110021 its reverse (120011022022), we get a palindrome (340231132043).

The spelling of 220220110021 in words is "two hundred twenty billion, two hundred twenty million, one hundred ten thousand, twenty-one".