21020010110012 has 36 divisors (see below), whose sum is σ = 39779899960920. Its totient is φ = 9706391446752.

The previous prime is 21020010109951. The next prime is 21020010110069. The reversal of 21020010110012 is 21001101002012.

It is a junction number, because it is equal to n+sod(n) for n = 21020010109975 and 21020010110002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171211778 + ... + 171334505.

Almost surely, 2^{21020010110012} is an apocalyptic number.

It is an amenable number.

21020010110012 is a deficient number, since it is larger than the sum of its proper divisors (18759889850908).

21020010110012 is a wasteful number, since it uses less digits than its factorization.

21020010110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342546362 (or 342546337 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21020010110012 its reverse (21001101002012), we get a palindrome (42021111112024).

The spelling of 21020010110012 in words is "twenty-one trillion, twenty billion, ten million, one hundred ten thousand, twelve".