21112666402012 has 12 divisors (see below), whose sum is σ = 36947256524640. Its totient is φ = 10556307394976.

The previous prime is 21112666401979. The next prime is 21112666402033. The reversal of 21112666402012 is 21020466621112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4548337 + ... + 7931752.

It is an arithmetic number, because the mean of its divisors is an integer number (3078938043720).

Almost surely, 2^{21112666402012} is an apocalyptic number.

It is an amenable number.

21112666402012 is a deficient number, since it is larger than the sum of its proper divisors (15834590122628).

21112666402012 is a wasteful number, since it uses less digits than its factorization.

21112666402012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12903020 (or 12903018 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 21112666402012 in words is "twenty-one trillion, one hundred twelve billion, six hundred sixty-six million, four hundred two thousand, twelve".