211011220123312 has 80 divisors (see below), whose sum is σ = 504820188993600. Its totient is φ = 85113769423872.

The previous prime is 211011220123309. The next prime is 211011220123369. The reversal of 211011220123312 is 213321022110112.

It is a happy number.

It is a super-2 number, since 2×211011220123312² (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, 1130776303 + ... + 1130962894.

It is an arithmetic number, because the mean of its divisors is an integer number (6310252362420).

Almost surely, 2^{211011220123312} is an apocalyptic number.

It is an amenable number.

211011220123312 is an abundant number, since it is smaller than the sum of its proper divisors (293808968870288).

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

211011220123312 is a wasteful number, since it uses less digits than its factorization.

211011220123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261739243 (or 2261739223 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 211011220123312 its reverse (213321022110112), we get a palindrome (424332242233424).

The spelling of 211011220123312 in words is "two hundred eleven trillion, eleven billion, two hundred twenty million, one hundred twenty-three thousand, three hundred twelve".