21021103202012 has 12 divisors (see below), whose sum is σ = 36788097071376. Its totient is φ = 10510218324480.

The previous prime is 21021103201979. The next prime is 21021103202093. The reversal of 21021103202012 is 21020230112012.

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, 83177189 + ... + 83429532.

It is an arithmetic number, because the mean of its divisors is an integer number (3065674755948).

Almost surely, 2^{21021103202012} is an apocalyptic number.

It is an amenable number.

21021103202012 is a deficient number, since it is larger than the sum of its proper divisors (15766993869364).

21021103202012 is a wasteful number, since it uses less digits than its factorization.

21021103202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166638268 (or 166638266 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21021103202012 its reverse (21020230112012), we get a palindrome (42041333314024).

The spelling of 21021103202012 in words is "twenty-one trillion, twenty-one billion, one hundred three million, two hundred two thousand, twelve".