211021613211220 has 48 divisors (see below), whose sum is σ = 506480414993280. Its totient is φ = 72346189774464.

The previous prime is 211021613211217. The next prime is 211021613211281. The reversal of 211021613211220 is 22112316120112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39981675 + ... + 44950834.

It is an arithmetic number, because the mean of its divisors is an integer number (10551675312360).

Almost surely, 2^{211021613211220} is an apocalyptic number.

211021613211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021613211220 is an abundant number, since it is smaller than the sum of its proper divisors (295458801782060).

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

211021613211220 is a wasteful number, since it uses less digits than its factorization.

211021613211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84950272 (or 84950270 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 211021613211220 its reverse (22112316120112), we get a palindrome (233133929331332).

The spelling of 211021613211220 in words is "two hundred eleven trillion, twenty-one billion, six hundred thirteen million, two hundred eleven thousand, two hundred twenty".