1220121120212 has 12 divisors (see below), whose sum is σ = 2135574086100. Its totient is φ = 609957095616.

The previous prime is 1220121120191. The next prime is 1220121120223. The reversal of 1220121120212 is 2120211210221.

It can be written as a sum of positive squares in 2 ways, for example, as 1051104754756 + 169016365456 = 1025234^2 + 411116^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 25839587 + ... + 25886762.

It is an arithmetic number, because the mean of its divisors is an integer number (177964507175).

Almost surely, 2^{1220121120212} is an apocalyptic number.

It is an amenable number.

1220121120212 is a deficient number, since it is larger than the sum of its proper divisors (915452965888).

1220121120212 is a wasteful number, since it uses less digits than its factorization.

1220121120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51732250 (or 51732248 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1220121120212 its reverse (2120211210221), we get a palindrome (3340332330433).

Subtracting 1220121120212 from its reverse (2120211210221), we obtain a palindrome (900090090009).

The spelling of 1220121120212 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twelve".