21020112010012 has 12 divisors (see below), whose sum is σ = 36786192004576. Its totient is φ = 10509771437280.

The previous prime is 21020112009983. The next prime is 21020112010013. The reversal of 21020112010012 is 21001021102012.

It is a junction number, because it is equal to n+sod(n) for n = 21020112009974 and 21020112010001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020112010013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70975689 + ... + 71271232.

Almost surely, 2^{21020112010012} is an apocalyptic number.

It is an amenable number.

21020112010012 is a deficient number, since it is larger than the sum of its proper divisors (15766079994564).

21020112010012 is a wasteful number, since it uses less digits than its factorization.

21020112010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142283868 (or 142283866 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21020112010012 its reverse (21001021102012), we get a palindrome (42021133112024).

The spelling of 21020112010012 in words is "twenty-one trillion, twenty billion, one hundred twelve million, ten thousand, twelve".