11211210012 has 24 divisors (see below), whose sum is σ = 26866504336. Its totient is φ = 3636067968.

The previous prime is 11211210007. The next prime is 11211210019. The reversal of 11211210012 is 21001211211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 11211210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211210019) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12624793 + ... + 12625680.

Almost surely, 2^11211210012 is an apocalyptic number.

11211210012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11211210012 is an abundant number, since it is smaller than the sum of its proper divisors (15655294324).

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

11211210012 is a wasteful number, since it uses less digits than its factorization.

11211210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25250517 (or 25250515 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11211210012 its reverse (21001211211), we get a palindrome (32212421223).

It can be divided in two parts, 11211 and 210012, that multiplied together give a palindrome (2354444532).

The spelling of 11211210012 in words is "eleven billion, two hundred eleven million, two hundred ten thousand, twelve".