220012022212121 has 8 divisors (see below), whose sum is σ = 221360869150344. Its totient is φ = 218665519058560.

The previous prime is 220012022212097. The next prime is 220012022212181. The reversal of 220012022212121 is 121212220210022.

It can be written as a sum of positive squares in 4 ways, for example, as 72233085990025 + 147778936222096 = 8499005^2 + 12156436^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220012022212121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220012022212093 and 220012022212102.

It is not an unprimeable number, because it can be changed into a prime (220012022212181) 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, 585757850 + ... + 586133331.

It is an arithmetic number, because the mean of its divisors is an integer number (27670108643793).

Almost surely, 2^{220012022212121} is an apocalyptic number.

It is an amenable number.

220012022212121 is a deficient number, since it is larger than the sum of its proper divisors (1348846938223).

220012022212121 is a wasteful number, since it uses less digits than its factorization.

220012022212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171892331.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 220012022212121 its reverse (121212220210022), we get a palindrome (341224242422143).

The spelling of 220012022212121 in words is "two hundred twenty trillion, twelve billion, twenty-two million, two hundred twelve thousand, one hundred twenty-one".