20212211211220 has 48 divisors (see below), whose sum is σ = 51362795554560. Its totient is φ = 6522259751424.

The previous prime is 20212211211187. The next prime is 20212211211259. The reversal of 20212211211220 is 2211211221202.

It is a congruent number.

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, 4246260480 + ... + 4246265239.

It is an arithmetic number, because the mean of its divisors is an integer number (1070058240720).

Almost surely, 2^{20212211211220} is an apocalyptic number.

20212211211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212211211220 is an abundant number, since it is smaller than the sum of its proper divisors (31150584343340).

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

20212211211220 is a wasteful number, since it uses less digits than its factorization.

20212211211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492525752 (or 8492525750 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20212211211220 its reverse (2211211221202), we get a palindrome (22423422432422).

The spelling of 20212211211220 in words is "twenty trillion, two hundred twelve billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty".