220100201021 has 8 divisors (see below), whose sum is σ = 221119892280. Its totient is φ = 219081019392.

The previous prime is 220100201017. The next prime is 220100201053. The reversal of 220100201021 is 120102001022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23154187225 + 196946013796 = 152165^2 + 443786^2 .

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 220100201021 - 2² = 220100201017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100200993 and 220100201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100201621) 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, 752381 + ... + 1003133.

It is an arithmetic number, because the mean of its divisors is an integer number (27639986535).

Almost surely, 2^220100201021 is an apocalyptic number.

It is an amenable number.

220100201021 is a deficient number, since it is larger than the sum of its proper divisors (1019691259).

220100201021 is a wasteful number, since it uses less digits than its factorization.

220100201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254815.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220100201021 its reverse (120102001022), we get a palindrome (340202202043).

The spelling of 220100201021 in words is "two hundred twenty billion, one hundred million, two hundred one thousand, twenty-one".