211230121312 has 24 divisors (see below), whose sum is σ = 475267773456. Its totient is φ = 90527194752.

The previous prime is 211230121309. The next prime is 211230121351. The reversal of 211230121312 is 213121032112.

211230121312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 211230121312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471495583 + ... + 471496030.

It is an arithmetic number, because the mean of its divisors is an integer number (19802823894).

Almost surely, 2^211230121312 is an apocalyptic number.

It is an amenable number.

211230121312 is an abundant number, since it is smaller than the sum of its proper divisors (264037652144).

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

211230121312 is an equidigital number, since it uses as much as digits as its factorization.

211230121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942991630 (or 942991622 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211230121312 its reverse (213121032112), we get a palindrome (424351153424).

The spelling of 211230121312 in words is "two hundred eleven billion, two hundred thirty million, one hundred twenty-one thousand, three hundred twelve".