211220210120 has 32 divisors (see below), whose sum is σ = 475781342400. Its totient is φ = 84392818368.

The previous prime is 211220210093. The next prime is 211220210141. The reversal of 211220210120 is 21012022112.

It is a super-2 number, since 2×211220210120² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220210095 and 211220210104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2941130 + ... + 3012089.

It is an arithmetic number, because the mean of its divisors is an integer number (14868166950).

Almost surely, 2^211220210120 is an apocalyptic number.

211220210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220210120 is an abundant number, since it is smaller than the sum of its proper divisors (264561132280).

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

211220210120 is a wasteful number, since it uses less digits than its factorization.

211220210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5954117 (or 5954113 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211220210120 its reverse (21012022112), we get a palindrome (232232232232).

The spelling of 211220210120 in words is "two hundred eleven billion, two hundred twenty million, two hundred ten thousand, one hundred twenty".