21010210111012 has 24 divisors (see below), whose sum is σ = 38042457183360. Its totient is φ = 10141064858400.

The previous prime is 21010210110991. The next prime is 21010210111039. The reversal of 21010210111012 is 21011101201012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21010210110983 and 21010210111001.

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, 15370188 + ... + 16681219.

It is an arithmetic number, because the mean of its divisors is an integer number (1585102382640).

Almost surely, 2^{21010210111012} is an apocalyptic number.

It is an amenable number.

21010210111012 is a deficient number, since it is larger than the sum of its proper divisors (17032247072348).

21010210111012 is a wasteful number, since it uses less digits than its factorization.

21010210111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32057091 (or 32057089 counting only the distinct ones).

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

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

The spelling of 21010210111012 in words is "twenty-one trillion, ten billion, two hundred ten million, one hundred eleven thousand, twelve".