1220611501212 has 48 divisors (see below), whose sum is σ = 2875508428800. Its totient is φ = 402972690240.

The previous prime is 1220611501189. The next prime is 1220611501237. The reversal of 1220611501212 is 2121051160221.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 637912 + ... + 1687647.

It is an arithmetic number, because the mean of its divisors is an integer number (59906425600).

Almost surely, 2^{1220611501212} is an apocalyptic number.

1220611501212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220611501212 is an abundant number, since it is smaller than the sum of its proper divisors (1654896927588).

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

1220611501212 is a wasteful number, since it uses less digits than its factorization.

1220611501212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325986 (or 2325984 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 1220611501212 its reverse (2121051160221), we get a palindrome (3341662661433).

The spelling of 1220611501212 in words is "one trillion, two hundred twenty billion, six hundred eleven million, five hundred one thousand, two hundred twelve".