11001000021012 has 18 divisors (see below), whose sum is σ = 27808083386538. Its totient is φ = 3667000006992.

The previous prime is 11001000020993. The next prime is 11001000021029. The reversal of 11001000021012 is 21012000010011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6005077676676 + 4995922344336 = 2450526^2 + 2235156^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 = 11001000020985 and 11001000021003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152791666923 + ... + 152791666994.

Almost surely, 2^{11001000021012} is an apocalyptic number.

11001000021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11001000021012 is an abundant number, since it is smaller than the sum of its proper divisors (16807083365526).

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

11001000021012 is a wasteful number, since it uses less digits than its factorization.

11001000021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305583333927 (or 305583333922 counting only the distinct ones).

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

Adding to 11001000021012 its reverse (21012000010011), we get a palindrome (32013000031023).

The spelling of 11001000021012 in words is "eleven trillion, one billion, twenty-one thousand, twelve".