222121011101212 has 12 divisors (see below), whose sum is σ = 388838509510360. Its totient is φ = 111024294098256.

The previous prime is 222121011101203. The next prime is 222121011101267. The reversal of 222121011101212 is 212101110121222.

It is a happy number.

222121011101212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 222121011101212.

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, 9052849287 + ... + 9052873822.

Almost surely, 2^{222121011101212} is an apocalyptic number.

It is an amenable number.

222121011101212 is a deficient number, since it is larger than the sum of its proper divisors (166717498409148).

222121011101212 is a wasteful number, since it uses less digits than its factorization.

222121011101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18105726180 (or 18105726178 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222121011101212 its reverse (212101110121222), we get a palindrome (434222121222434).

It can be divided in two parts, 22 and 2121011101212, that multiplied together give a palindrome (46662244226664).

The spelling of 222121011101212 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, eleven million, one hundred one thousand, two hundred twelve".