11211021012012 has 48 divisors (see below), whose sum is σ = 28341951910272. Its totient is φ = 3435388104960.

The previous prime is 11211021012011. The next prime is 11211021012043. The reversal of 11211021012012 is 21021012011211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11211021011982 and 11211021012000.

It is not an unprimeable number, because it can be changed into a prime (11211021012011) 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 15 ways as a sum of consecutive naturals, for example, 639014314 + ... + 639031857.

It is an arithmetic number, because the mean of its divisors is an integer number (590457331464).

Almost surely, 2^{11211021012012} is an apocalyptic number.

11211021012012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11211021012012 is an abundant number, since it is smaller than the sum of its proper divisors (17130930898260).

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

11211021012012 is a wasteful number, since it uses less digits than its factorization.

11211021012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278046238 (or 1278046236 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11211021012012 its reverse (21021012011211), we get a palindrome (32232033023223).

The spelling of 11211021012012 in words is "eleven trillion, two hundred eleven billion, twenty-one million, twelve thousand, twelve".