220021223020045 has 8 divisors (see below), whose sum is σ = 264043560322296. Its totient is φ = 176004916617216.

The previous prime is 220021223020043. The next prime is 220021223020057. The reversal of 220021223020045 is 540020322120022.

It can be written as a sum of positive squares in 4 ways, for example, as 2943756884644 + 217077466135401 = 1715738^2 + 14733549^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220021223020045 - 2¹ = 220021223020043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021223020043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1507644592 + ... + 1507790521.

It is an arithmetic number, because the mean of its divisors is an integer number (33005445040287).

Almost surely, 2^{220021223020045} is an apocalyptic number.

It is an amenable number.

220021223020045 is a deficient number, since it is larger than the sum of its proper divisors (44022337302251).

220021223020045 is a wasteful number, since it uses less digits than its factorization.

220021223020045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015449711.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 220021223020045 its reverse (540020322120022), we get a palindrome (760041545140067).

The spelling of 220021223020045 in words is "two hundred twenty trillion, twenty-one billion, two hundred twenty-three million, twenty thousand, forty-five".