220100222021 has 8 divisors (see below), whose sum is σ = 224471950584. Its totient is φ = 215753123520.

The previous prime is 220100221997. The next prime is 220100222107. The reversal of 220100222021 is 120222001022.

It can be written as a sum of positive squares in 4 ways, for example, as 1928088100 + 218172133921 = 43910^2 + 467089^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220100222021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100221987 and 220100222005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100224021) 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, 6139466 + ... + 6175211.

It is an arithmetic number, because the mean of its divisors is an integer number (28058993823).

Almost surely, 2^220100222021 is an apocalyptic number.

It is an amenable number.

220100222021 is a deficient number, since it is larger than the sum of its proper divisors (4371728563).

220100222021 is a wasteful number, since it uses less digits than its factorization.

220100222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12315031.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 220100222021 its reverse (120222001022), we get a palindrome (340322223043).

The spelling of 220100222021 in words is "two hundred twenty billion, one hundred million, two hundred twenty-two thousand, twenty-one".