1220112012212 has 12 divisors (see below), whose sum is σ = 2260795787460. Its totient is φ = 574170358656.

The previous prime is 1220112012187. The next prime is 1220112012221. The reversal of 1220112012212 is 2122102110221.

It can be written as a sum of positive squares in 2 ways, for example, as 753139322896 + 466972689316 = 867836^2 + 683354^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 8971411787 + ... + 8971411922.

It is an arithmetic number, because the mean of its divisors is an integer number (188399648955).

Almost surely, 2^{1220112012212} is an apocalyptic number.

It is an amenable number.

1220112012212 is a deficient number, since it is larger than the sum of its proper divisors (1040683775248).

1220112012212 is a wasteful number, since it uses less digits than its factorization.

1220112012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17942823730 (or 17942823728 counting only the distinct ones).

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

Adding to 1220112012212 its reverse (2122102110221), we get a palindrome (3342214122433).

The spelling of 1220112012212 in words is "one trillion, two hundred twenty billion, one hundred twelve million, twelve thousand, two hundred twelve".