1220211001012 has 6 divisors (see below), whose sum is σ = 2135369251778. Its totient is φ = 610105500504.

The previous prime is 1220211001001. The next prime is 1220211001021. The reversal of 1220211001012 is 2101001120221.

It can be written as a sum of positive squares in only one way, i.e., 799443421456 + 420767579556 = 894116^2 + 648666^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220211000983 and 1220211001001.

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 as a sum of consecutive naturals, namely, 152526375123 + ... + 152526375130.

Almost surely, 2^{1220211001012} is an apocalyptic number.

It is an amenable number.

1220211001012 is a deficient number, since it is larger than the sum of its proper divisors (915158250766).

1220211001012 is a wasteful number, since it uses less digits than its factorization.

1220211001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305052750257 (or 305052750255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220211001012 its reverse (2101001120221), we get a palindrome (3321212121233).

The spelling of 1220211001012 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one thousand, twelve".