220111021212210 has 48 divisors (see below), whose sum is σ = 605952693694296. Its totient is φ = 55243550421504.

The previous prime is 220111021212191. The next prime is 220111021212233. The reversal of 220111021212210 is 12212120111022.

220111021212210 is a `hidden beast` number, since 220 + 1 + 1 + 1 + 0 + 21 + 212 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 179063819649729 + 41047201562481 = 13381473^2 + 6406809^2 .

It is a super-4 number, since 4×220111021212210⁴ (a number of 58 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71931704749 + ... + 71931707808.

Almost surely, 2^{220111021212210} is an apocalyptic number.

220111021212210 is an abundant number, since it is smaller than the sum of its proper divisors (385841672482086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220111021212210 is a wasteful number, since it uses less digits than its factorization.

220111021212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143863412587 (or 143863412584 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220111021212210 its reverse (12212120111022), we get a palindrome (232323141323232).

The spelling of 220111021212210 in words is "two hundred twenty trillion, one hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred ten".