211221022221120 has 112 divisors (see below), whose sum is σ = 686222716512960. Its totient is φ = 55015708102656.

The previous prime is 211221022221113. The next prime is 211221022221137. The reversal of 211221022221120 is 21122220122112.

It is a super-2 number, since 2×211221022221120² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 2558352885 + ... + 2558435444.

Almost surely, 2^{211221022221120} is an apocalyptic number.

211221022221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211221022221120 is an abundant number, since it is smaller than the sum of its proper divisors (475001694291840).

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

211221022221120 is a wasteful number, since it uses less digits than its factorization.

211221022221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116788392 (or 5116788382 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 211221022221120 its reverse (21122220122112), we get a palindrome (232343242343232).

The spelling of 211221022221120 in words is "two hundred eleven trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, one hundred twenty".