212101320232220 has 12 divisors (see below), whose sum is σ = 445412772487704. Its totient is φ = 84840528092880.

The previous prime is 212101320232157. The next prime is 212101320232223. The reversal of 212101320232220 is 22232023101212.

It is a happy number.

It is a super-2 number, since 2×212101320232220² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101320232223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5302533005786 + ... + 5302533005825.

It is an arithmetic number, because the mean of its divisors is an integer number (37117731040642).

Almost surely, 2^{212101320232220} is an apocalyptic number.

212101320232220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212101320232220 is an abundant number, since it is smaller than the sum of its proper divisors (233311452255484).

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

212101320232220 is a wasteful number, since it uses less digits than its factorization.

212101320232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10605066011620 (or 10605066011618 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212101320232220 its reverse (22232023101212), we get a palindrome (234333343333432).

The spelling of 212101320232220 in words is "two hundred twelve trillion, one hundred one billion, three hundred twenty million, two hundred thirty-two thousand, two hundred twenty".