212101011201220 has 24 divisors (see below), whose sum is σ = 471612836671704. Its totient is φ = 79849792452096.

The previous prime is 212101011201187. The next prime is 212101011201223. The reversal of 212101011201220 is 22102110101212.

It can be written as a sum of positive squares in 4 ways, for example, as 16548363649024 + 195552647552196 = 4067968^2 + 13984014^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212101011201194 and 212101011201203.

It is not an unprimeable number, because it can be changed into a prime (212101011201223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311913251427 + ... + 311913252106.

It is an arithmetic number, because the mean of its divisors is an integer number (19650534861321).

Almost surely, 2^{212101011201220} is an apocalyptic number.

212101011201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212101011201220 is an abundant number, since it is smaller than the sum of its proper divisors (259511825470484).

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

212101011201220 is a wasteful number, since it uses less digits than its factorization.

212101011201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623826503559 (or 623826503557 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212101011201220 its reverse (22102110101212), we get a palindrome (234203121302432).

The spelling of 212101011201220 in words is "two hundred twelve trillion, one hundred one billion, eleven million, two hundred one thousand, two hundred twenty".