1220001220012 has 12 divisors (see below), whose sum is σ = 2135230762896. Its totient is φ = 609935287760.

The previous prime is 1220001219991. The next prime is 1220001220019. The reversal of 1220001220012 is 2100221000221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220001219974 and 1220001220001.

It is not an unprimeable number, because it can be changed into a prime (1220001220019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16288528 + ... + 16363255.

It is an arithmetic number, because the mean of its divisors is an integer number (177935896908).

Almost surely, 2^{1220001220012} is an apocalyptic number.

It is an amenable number.

1220001220012 is a deficient number, since it is larger than the sum of its proper divisors (915229542884).

1220001220012 is a wasteful number, since it uses less digits than its factorization.

1220001220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32661128 (or 32661126 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1220001220012 its reverse (2100221000221), we get a palindrome (3320222220233).

The spelling of 1220001220012 in words is "one trillion, two hundred twenty billion, one million, two hundred twenty thousand, twelve".