212021221222220 has 24 divisors (see below), whose sum is σ = 445317543771408. Its totient is φ = 84794587688000.

The previous prime is 212021221222183. The next prime is 212021221222361. The reversal of 212021221222220 is 22222122120212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 868674986 + ... + 868919025.

It is an arithmetic number, because the mean of its divisors is an integer number (18554897657142).

Almost surely, 2^{212021221222220} is an apocalyptic number.

212021221222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021221222220 is an abundant number, since it is smaller than the sum of its proper divisors (233296322549188).

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

212021221222220 is a wasteful number, since it uses less digits than its factorization.

212021221222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737600121 (or 1737600119 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 212021221222220 its reverse (22222122120212), we get a palindrome (234243343342432).

The spelling of 212021221222220 in words is "two hundred twelve trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".