212011111200280 has 64 divisors (see below), whose sum is σ = 559905791768640. Its totient is φ = 70724942111232.

The previous prime is 212011111200263. The next prime is 212011111200281. The reversal of 212011111200280 is 82002111110212.

It is a happy number.

It is a super-2 number, since 2×212011111200280² (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 (212011111200281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10232186127 + ... + 10232206846.

It is an arithmetic number, because the mean of its divisors is an integer number (8748527996385).

Almost surely, 2^{212011111200280} is an apocalyptic number.

212011111200280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212011111200280 is an abundant number, since it is smaller than the sum of its proper divisors (347894680568360).

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

212011111200280 is a wasteful number, since it uses less digits than its factorization.

212011111200280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20464393028 (or 20464393024 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 212011111200280 its reverse (82002111110212), we get a palindrome (294013222310492).

The spelling of 212011111200280 in words is "two hundred twelve trillion, eleven billion, one hundred eleven million, two hundred thousand, two hundred eighty".