1220212100444 has 12 divisors (see below), whose sum is σ = 2149702527000. Its totient is φ = 606011378448.

The previous prime is 1220212100411. The next prime is 1220212100473. The reversal of 1220212100444 is 4440012120221.

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, 1023667274 + ... + 1023668465.

It is an arithmetic number, because the mean of its divisors is an integer number (179141877250).

Almost surely, 2^{1220212100444} is an apocalyptic number.

It is an amenable number.

1220212100444 is a deficient number, since it is larger than the sum of its proper divisors (929490426556).

1220212100444 is a wasteful number, since it uses less digits than its factorization.

1220212100444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047335892 (or 2047335890 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 1220212100444 its reverse (4440012120221), we get a palindrome (5660224220665).

The spelling of 1220212100444 in words is "one trillion, two hundred twenty billion, two hundred twelve million, one hundred thousand, four hundred forty-four".