11021100012 has 36 divisors (see below), whose sum is σ = 30001884640. Its totient is φ = 3391107552.

The previous prime is 11021100011. The next prime is 11021100019. The reversal of 11021100012 is 21000112011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11021099967 and 11021100003.

It is not an unprimeable number, because it can be changed into a prime (11021100011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11774212 + ... + 11775147.

Almost surely, 2^11021100012 is an apocalyptic number.

11021100012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11021100012 is an abundant number, since it is smaller than the sum of its proper divisors (18980784628).

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

11021100012 is a wasteful number, since it uses less digits than its factorization.

11021100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23549382 (or 23549377 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11021100012 its reverse (21000112011), we get a palindrome (32021212023).

The spelling of 11021100012 in words is "eleven billion, twenty-one million, one hundred thousand, twelve".