220012021012121 has 8 divisors (see below), whose sum is σ = 236947800810504. Its totient is φ = 203077923811200.

The previous prime is 220012021012117. The next prime is 220012021012139. The reversal of 220012021012121 is 121210120210022.

It can be written as a sum of positive squares in 4 ways, for example, as 5509634202121 + 214502386810000 = 2347261^2 + 14645900^2 .

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 220012021012121 - 2² = 220012021012117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220012021012121.

It is not an unprimeable number, because it can be changed into a prime (220012021012921) 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 7 ways as a sum of consecutive naturals, for example, 420377780 + ... + 420900821.

It is an arithmetic number, because the mean of its divisors is an integer number (29618475101313).

Almost surely, 2^{220012021012121} is an apocalyptic number.

It is an amenable number.

220012021012121 is a deficient number, since it is larger than the sum of its proper divisors (16935779798383).

220012021012121 is a wasteful number, since it uses less digits than its factorization.

220012021012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841298731.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220012021012121 its reverse (121210120210022), we get a palindrome (341222141222143).

The spelling of 220012021012121 in words is "two hundred twenty trillion, twelve billion, twenty-one million, twelve thousand, one hundred twenty-one".