21001011210112 has 16 divisors (see below), whose sum is σ = 41837952020400. Its totient is φ = 10500505604992.

The previous prime is 21001011210083. The next prime is 21001011210191. The reversal of 21001011210112 is 21101211010012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×21001011210112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21001011210092 and 21001011210101.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 82035199912 + ... + 82035200167.

It is an arithmetic number, because the mean of its divisors is an integer number (2614872001275).

Almost surely, 2^{21001011210112} is an apocalyptic number.

It is an amenable number.

21001011210112 is a deficient number, since it is larger than the sum of its proper divisors (20836940810288).

21001011210112 is an equidigital number, since it uses as much as digits as its factorization.

21001011210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164070400093 (or 164070400081 counting only the distinct ones).

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

Adding to 21001011210112 its reverse (21101211010012), we get a palindrome (42102222220124).

The spelling of 21001011210112 in words is "twenty-one trillion, one billion, eleven million, two hundred ten thousand, one hundred twelve".