220100621 has 16 divisors (see below), whose sum is σ = 244413120. Its totient is φ = 196940160.

The previous prime is 220100603. The next prime is 220100623. The reversal of 220100621 is 126001022.

220100621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 220100621 - 2¹⁸ = 219838477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100596 and 220100605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54026 + ... + 57956.

It is an arithmetic number, because the mean of its divisors is an integer number (15275820).

Almost surely, 2^220100621 is an apocalyptic number.

It is an amenable number.

220100621 is a deficient number, since it is larger than the sum of its proper divisors (24312499).

220100621 is a wasteful number, since it uses less digits than its factorization.

220100621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 220100621 is about 14835.7885196575. The cubic root of 220100621 is about 603.7730944904.

Adding to 220100621 its reverse (126001022), we get a palindrome (346101643).

The spelling of 220100621 in words is "two hundred twenty million, one hundred thousand, six hundred twenty-one".