220000022121121 has 12 divisors (see below), whose sum is σ = 250156764969300. Its totient is φ = 193103467689440.

The previous prime is 220000022121107. The next prime is 220000022121169. The reversal of 220000022121121 is 121121220000022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52175485027600 + 167824537093521 = 7223260^2 + 12954711^2 .

It is not a de Polignac number, because 220000022121121 - 2²¹ = 220000020023969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220000022121095 and 220000022121104.

It is not an unprimeable number, because it can be changed into a prime (220000022121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31347962026 + ... + 31347969043.

It is an arithmetic number, because the mean of its divisors is an integer number (20846397080775).

Almost surely, 2^{220000022121121} is an apocalyptic number.

It is an amenable number.

220000022121121 is a deficient number, since it is larger than the sum of its proper divisors (30156742848179).

220000022121121 is a wasteful number, since it uses less digits than its factorization.

220000022121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62695931120 (or 62695931109 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220000022121121 its reverse (121121220000022), we get a palindrome (341121242121143).

It can be divided in two parts, 220000022 and 121121, that multiplied together give a palindrome (26646622664662).

The spelling of 220000022121121 in words is "two hundred twenty trillion, twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".