20121003042220 has 48 divisors (see below), whose sum is σ = 42400163594880. Its totient is φ = 8020625792256.

The previous prime is 20121003042211. The next prime is 20121003042241. The reversal of 20121003042220 is 2224030012102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5752486 + ... + 8563474.

It is an arithmetic number, because the mean of its divisors is an integer number (883336741560).

Almost surely, 2^{20121003042220} is an apocalyptic number.

20121003042220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121003042220 is an abundant number, since it is smaller than the sum of its proper divisors (22279160552660).

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

20121003042220 is a wasteful number, since it uses less digits than its factorization.

20121003042220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812234 (or 2812232 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20121003042220 its reverse (2224030012102), we get a palindrome (22345033054322).

The spelling of 20121003042220 in words is "twenty trillion, one hundred twenty-one billion, three million, forty-two thousand, two hundred twenty".