1212020020221 has 8 divisors (see below), whose sum is σ = 1618866813120. Its totient is φ = 806593287072.

The previous prime is 1212020020193. The next prime is 1212020020223. The reversal of 1212020020221 is 1220200202121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212020020221 - 2¹³ = 1212020012029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212020020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212020020223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355012945 + ... + 355016358.

It is an arithmetic number, because the mean of its divisors is an integer number (202358351640).

Almost surely, 2^{1212020020221} is an apocalyptic number.

It is an amenable number.

1212020020221 is a deficient number, since it is larger than the sum of its proper divisors (406846792899).

1212020020221 is an equidigital number, since it uses as much as digits as its factorization.

1212020020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710029875.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1212020020221 its reverse (1220200202121), we get a palindrome (2432220222342).

The spelling of 1212020020221 in words is "one trillion, two hundred twelve billion, twenty million, twenty thousand, two hundred twenty-one".