211220321244 has 24 divisors (see below), whose sum is σ = 514275565440. Its totient is φ = 67345609584.

The previous prime is 211220321233. The next prime is 211220321251. The reversal of 211220321244 is 442123022112.

It is a super-2 number, since 2×211220321244² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382645234 + ... + 382645785.

It is an arithmetic number, because the mean of its divisors is an integer number (21428148560).

Almost surely, 2^211220321244 is an apocalyptic number.

It is an amenable number.

211220321244 is an abundant number, since it is smaller than the sum of its proper divisors (303055244196).

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

211220321244 is a wasteful number, since it uses less digits than its factorization.

211220321244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765291049 (or 765291047 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 211220321244 its reverse (442123022112), we get a palindrome (653343343356).

The spelling of 211220321244 in words is "two hundred eleven billion, two hundred twenty million, three hundred twenty-one thousand, two hundred forty-four".