220022030021 has 4 divisors (see below), whose sum is σ = 224173389132. Its totient is φ = 215870670912.

The previous prime is 220022029999. The next prime is 220022030027. The reversal of 220022030021 is 120030220022.

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 139528396225 + 80493633796 = 373535^2 + 283714^2 .

It is a cyclic number.

It is not a de Polignac number, because 220022030021 - 2⁶ = 220022029957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220022029978 and 220022030005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220022030027) 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, 2075679476 + ... + 2075679581.

It is an arithmetic number, because the mean of its divisors is an integer number (56043347283).

Almost surely, 2^220022030021 is an apocalyptic number.

It is an amenable number.

220022030021 is a deficient number, since it is larger than the sum of its proper divisors (4151359111).

220022030021 is an equidigital number, since it uses as much as digits as its factorization.

220022030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4151359110.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 220022030021 its reverse (120030220022), we get a palindrome (340052250043).

The spelling of 220022030021 in words is "two hundred twenty billion, twenty-two million, thirty thousand, twenty-one".