21110011212012 has 24 divisors (see below), whose sum is σ = 49257134469312. Its totient is φ = 7036607312400.

The previous prime is 21110011211983. The next prime is 21110011212023. The reversal of 21110011212012 is 21021211001112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110011211982 and 21110011212000.

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, 6482314 + ... + 9178257.

It is an arithmetic number, because the mean of its divisors is an integer number (2052380602888).

Almost surely, 2^{21110011212012} is an apocalyptic number.

It is an amenable number.

21110011212012 is an abundant number, since it is smaller than the sum of its proper divisors (28147123257300).

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

21110011212012 is a wasteful number, since it uses less digits than its factorization.

21110011212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15772909 (or 15772907 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21110011212012 its reverse (21021211001112), we get a palindrome (42131222213124).

The spelling of 21110011212012 in words is "twenty-one trillion, one hundred ten billion, eleven million, two hundred twelve thousand, twelve".