211221200210120 has 64 divisors (see below), whose sum is σ = 488132246203200. Its totient is φ = 82198268570880.

The previous prime is 211221200210107. The next prime is 211221200210147. The reversal of 211221200210120 is 21012002122112.

It is a super-2 number, since 2×211221200210120² (a number of 29 digits) contains 22 as substring.

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, 12228491 + ... + 23916069.

It is an arithmetic number, because the mean of its divisors is an integer number (7627066346925).

Almost surely, 2^{211221200210120} is an apocalyptic number.

211221200210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211221200210120 is an abundant number, since it is smaller than the sum of its proper divisors (276911045993080).

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

211221200210120 is a wasteful number, since it uses less digits than its factorization.

211221200210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11699838 (or 11699834 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211221200210120 its reverse (21012002122112), we get a palindrome (232233202332232).

The spelling of 211221200210120 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred million, two hundred ten thousand, one hundred twenty".