1220212212012 has 18 divisors (see below), whose sum is σ = 3084425313788. Its totient is φ = 406737403992.

The previous prime is 1220212212001. The next prime is 1220212212019. The reversal of 1220212212012 is 2102122120221.

It is a happy number.

1220212212012 is a `hidden beast` number, since 1 + 220 + 21 + 221 + 201 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (1220212212019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16947391798 + ... + 16947391869.

Almost surely, 2^{1220212212012} is an apocalyptic number.

1220212212012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220212212012 is an abundant number, since it is smaller than the sum of its proper divisors (1864213101776).

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

1220212212012 is a wasteful number, since it uses less digits than its factorization.

1220212212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33894783677 (or 33894783672 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1220212212012 its reverse (2102122120221), we get a palindrome (3322334332233).

The spelling of 1220212212012 in words is "one trillion, two hundred twenty billion, two hundred twelve million, two hundred twelve thousand, twelve".