212121120011020 has 48 divisors (see below), whose sum is σ = 490761590399136. Its totient is φ = 76371240320000.

The previous prime is 212121120010999. The next prime is 212121120011029. The reversal of 212121120011020 is 20110021121212.

It is a junction number, because it is equal to n+sod(n) for n = 212121120010985 and 212121120011003.

It is not an unprimeable number, because it can be changed into a prime (212121120011029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4773180301 + ... + 4773224740.

It is an arithmetic number, because the mean of its divisors is an integer number (10224199799982).

Almost surely, 2^{212121120011020} is an apocalyptic number.

212121120011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121120011020 is an abundant number, since it is smaller than the sum of its proper divisors (278640470388116).

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

212121120011020 is a wasteful number, since it uses less digits than its factorization.

212121120011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9546405162 (or 9546405160 counting only the distinct ones).

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

Adding to 212121120011020 its reverse (20110021121212), we get a palindrome (232231141132232).

The spelling of 212121120011020 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twenty million, eleven thousand, twenty".