211030357122 has 54 divisors (see below), whose sum is σ = 495169135227. Its totient is φ = 64924621632.

The previous prime is 211030357117. The next prime is 211030357171. The reversal of 211030357122 is 221753030112.

It can be written as a sum of positive squares in 5 ways, for example, as 219899241 + 210810457881 = 14829^2 + 459141^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=324831.

It is a super-2 number, since 2×211030357122² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 25332654 + ... + 25340982.

Almost surely, 2^211030357122 is an apocalyptic number.

211030357122 is an abundant number, since it is smaller than the sum of its proper divisors (284138778105).

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

211030357122 is an frugal number, since it uses more digits than its factorization.

211030357122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16692 (or 8347 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

Adding to 211030357122 its reverse (221753030112), we get a palindrome (432783387234).

The spelling of 211030357122 in words is "two hundred eleven billion, thirty million, three hundred fifty-seven thousand, one hundred twenty-two".