220100110020021 has 32 divisors (see below), whose sum is σ = 365881548211200. Its totient is φ = 114337455166080.

The previous prime is 220100110020001. The next prime is 220100110020047. The reversal of 220100110020021 is 120020011001022.

It is not a de Polignac number, because 220100110020021 - 2⁹ = 220100110019509 is a prime.

It is a super-3 number, since 3×220100110020021³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220100110019979 and 220100110020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100110020001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135782050 + ... + 137393468.

It is an arithmetic number, because the mean of its divisors is an integer number (11433798381600).

Almost surely, 2^{220100110020021} is an apocalyptic number.

220100110020021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220100110020021 is a deficient number, since it is larger than the sum of its proper divisors (145781438191179).

220100110020021 is a wasteful number, since it uses less digits than its factorization.

220100110020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202729.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 220100110020021 its reverse (120020011001022), we get a palindrome (340120121021043).

The spelling of 220100110020021 in words is "two hundred twenty trillion, one hundred billion, one hundred ten million, twenty thousand, twenty-one".