211221210000988 has 48 divisors (see below), whose sum is σ = 406098991872000. Its totient is φ = 95329919954880.

The previous prime is 211221210000953. The next prime is 211221210000989. The reversal of 211221210000988 is 889000012122112.

It is a super-2 number, since 2×211221210000988² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221210000989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1263628 + ... + 20592211.

It is an arithmetic number, because the mean of its divisors is an integer number (8460395664000).

Almost surely, 2^{211221210000988} is an apocalyptic number.

It is an amenable number.

211221210000988 is a deficient number, since it is larger than the sum of its proper divisors (194877781871012).

211221210000988 is a wasteful number, since it uses less digits than its factorization.

211221210000988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21857410 (or 21857408 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 37.

The spelling of 211221210000988 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred ten million, nine hundred eighty-eight", and thus it is an aban number.