211101011212 has 24 divisors (see below), whose sum is σ = 454679101856. Its totient is φ = 83512487808.

The previous prime is 211101011201. The next prime is 211101011213. The reversal of 211101011212 is 212110101112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 211101011192 and 211101011201.

It is not an unprimeable number, because it can be changed into a prime (211101011213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289973553 + ... + 289974280.

Almost surely, 2^211101011212 is an apocalyptic number.

It is an amenable number.

211101011212 is an abundant number, since it is smaller than the sum of its proper divisors (243578090644).

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

211101011212 is a wasteful number, since it uses less digits than its factorization.

211101011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579947857 (or 579947855 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211101011212 its reverse (212110101112), we get a palindrome (423211112324).

The spelling of 211101011212 in words is "two hundred eleven billion, one hundred one million, eleven thousand, two hundred twelve".