220100220122121 has 8 divisors (see below), whose sum is σ = 326074400180960. Its totient is φ = 146733480081396.

The previous prime is 220100220122039. The next prime is 220100220122143. The reversal of 220100220122121 is 121221022001022.

It is a happy number.

220100220122121 is a `hidden beast` number, since 2 + 201 + 0 + 0 + 220 + 1 + 221 + 21 = 666.

It is not a de Polignac number, because 220100220122121 - 2¹⁰ = 220100220121097 is a prime.

It is a super-2 number, since 2×220100220122121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100220122094 and 220100220122103.

It is not an unprimeable number, because it can be changed into a prime (220100220122171) 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, 4075930002235 + ... + 4075930002288.

It is an arithmetic number, because the mean of its divisors is an integer number (40759300022620).

Almost surely, 2^{220100220122121} is an apocalyptic number.

It is an amenable number.

220100220122121 is a deficient number, since it is larger than the sum of its proper divisors (105974180058839).

220100220122121 is an equidigital number, since it uses as much as digits as its factorization.

220100220122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8151860004532 (or 8151860004526 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 220100220122121 its reverse (121221022001022), we get a palindrome (341321242123143).

The spelling of 220100220122121 in words is "two hundred twenty trillion, one hundred billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".