1220402121212 has 6 divisors (see below), whose sum is σ = 2135703712128. Its totient is φ = 610201060604.

The previous prime is 1220402121209. The next prime is 1220402121217. The reversal of 1220402121212 is 2121212040221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220402121217) by changing a digit.

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, 152550265148 + ... + 152550265155.

It is an arithmetic number, because the mean of its divisors is an integer number (355950618688).

Almost surely, 2^{1220402121212} is an apocalyptic number.

It is an amenable number.

1220402121212 is a deficient number, since it is larger than the sum of its proper divisors (915301590916).

1220402121212 is a wasteful number, since it uses less digits than its factorization.

1220402121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305100530307 (or 305100530305 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1220402121212 its reverse (2121212040221), we get a palindrome (3341614161433).

The spelling of 1220402121212 in words is "one trillion, two hundred twenty billion, four hundred two million, one hundred twenty-one thousand, two hundred twelve".