201212111210220 has 72 divisors (see below), whose sum is σ = 665829168011280. Its totient is φ = 48778693626240.

The previous prime is 201212111210207. The next prime is 201212111210269. The reversal of 201212111210220 is 22012111212102.

201212111210220 is a `hidden beast` number, since 2 + 0 + 1 + 21 + 211 + 1 + 210 + 220 = 666.

It is a super-3 number, since 3×201212111210220³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201212111210193 and 201212111210202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50811137215 + ... + 50811141174.

It is an arithmetic number, because the mean of its divisors is an integer number (9247627333490).

Almost surely, 2^{201212111210220} is an apocalyptic number.

201212111210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212111210220 is an abundant number, since it is smaller than the sum of its proper divisors (464617056801060).

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

201212111210220 is a wasteful number, since it uses less digits than its factorization.

201212111210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101622278415 (or 101622278410 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201212111210220 its reverse (22012111212102), we get a palindrome (223224222422322).

The spelling of 201212111210220 in words is "two hundred one trillion, two hundred twelve billion, one hundred eleven million, two hundred ten thousand, two hundred twenty".