212120220221220 has 24 divisors (see below), whose sum is σ = 593936616619584. Its totient is φ = 56565392058976.

The previous prime is 212120220221207. The next prime is 212120220221291. The reversal of 212120220221220 is 22122022021212.

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, 1767668501784 + ... + 1767668501903.

It is an arithmetic number, because the mean of its divisors is an integer number (24747359025816).

Almost surely, 2^{212120220221220} is an apocalyptic number.

212120220221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212120220221220 is an abundant number, since it is smaller than the sum of its proper divisors (381816396398364).

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

212120220221220 is a wasteful number, since it uses less digits than its factorization.

212120220221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535337003699 (or 3535337003697 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 212120220221220 its reverse (22122022021212), we get a palindrome (234242242242432).

The spelling of 212120220221220 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty".