21011101201012 has 24 divisors (see below), whose sum is σ = 39604530588896. Its totient is φ = 9695793931488.

The previous prime is 21011101200997. The next prime is 21011101201021. The reversal of 21011101201012 is 21010210111012.

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 = 21011101200983 and 21011101201001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33801378 + ... + 34417369.

Almost surely, 2^{21011101201012} is an apocalyptic number.

It is an amenable number.

21011101201012 is a deficient number, since it is larger than the sum of its proper divisors (18593429387884).

21011101201012 is a wasteful number, since it uses less digits than its factorization.

21011101201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68224687 (or 68224685 counting only the distinct ones).

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

Adding to 21011101201012 its reverse (21010210111012), we get a palindrome (42021311312024).

The spelling of 21011101201012 in words is "twenty-one trillion, eleven billion, one hundred one million, two hundred one thousand, twelve".