212201100001220 has 96 divisors (see below), whose sum is σ = 498908513980800. Its totient is φ = 75160242662400.

The previous prime is 212201100001213. The next prime is 212201100001259. The reversal of 212201100001220 is 22100001102212.

It is a junction number, because it is equal to n+sod(n) for n = 212201100001195 and 212201100001204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73577441 + ... + 76407080.

It is an arithmetic number, because the mean of its divisors is an integer number (5196963687300).

Almost surely, 2^{212201100001220} is an apocalyptic number.

212201100001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212201100001220 is an abundant number, since it is smaller than the sum of its proper divisors (286707413979580).

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

212201100001220 is a wasteful number, since it uses less digits than its factorization.

212201100001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149984709 (or 149984707 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212201100001220 its reverse (22100001102212), we get a palindrome (234301101103432).

The spelling of 212201100001220 in words is "two hundred twelve trillion, two hundred one billion, one hundred million, one thousand, two hundred twenty".