220111021212 has 12 divisors (see below), whose sum is σ = 513592382856. Its totient is φ = 73370340400.

The previous prime is 220111021183. The next prime is 220111021279. The reversal of 220111021212 is 212120111022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 220111021191 and 220111021200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9171292539 + ... + 9171292562.

It is an arithmetic number, because the mean of its divisors is an integer number (42799365238).

Almost surely, 2^220111021212 is an apocalyptic number.

It is an amenable number.

220111021212 is an abundant number, since it is smaller than the sum of its proper divisors (293481361644).

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

220111021212 is a wasteful number, since it uses less digits than its factorization.

220111021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18342585108 (or 18342585106 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220111021212 its reverse (212120111022), we get a palindrome (432231132234).

The spelling of 220111021212 in words is "two hundred twenty billion, one hundred eleven million, twenty-one thousand, two hundred twelve".