220212122122221 has 16 divisors (see below), whose sum is σ = 296311319462400. Its totient is φ = 145460516102208.

The previous prime is 220212122122219. The next prime is 220212122122253. The reversal of 220212122122221 is 122221221212022.

It is a happy number.

It is not a de Polignac number, because 220212122122221 - 2¹ = 220212122122219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220212122122191 and 220212122122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220212122132221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71199775 + ... + 74228243.

It is an arithmetic number, because the mean of its divisors is an integer number (18519457466400).

Almost surely, 2^{220212122122221} is an apocalyptic number.

It is an amenable number.

220212122122221 is a deficient number, since it is larger than the sum of its proper divisors (76099197340179).

220212122122221 is a wasteful number, since it uses less digits than its factorization.

220212122122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250948.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 220212122122221 its reverse (122221221212022), we get a palindrome (342433343334243).

The spelling of 220212122122221 in words is "two hundred twenty trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".