21011020202012 has 12 divisors (see below), whose sum is σ = 36769355519736. Its totient is φ = 10505490053520.

The previous prime is 21011020201933. The next prime is 21011020202041. The reversal of 21011020202012 is 21020202011012.

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, 2515583 + ... + 6953430.

It is an arithmetic number, because the mean of its divisors is an integer number (3064112959978).

Almost surely, 2^{21011020202012} is an apocalyptic number.

It is an amenable number.

21011020202012 is a deficient number, since it is larger than the sum of its proper divisors (15758335317724).

21011020202012 is a wasteful number, since it uses less digits than its factorization.

21011020202012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10023748 (or 10023746 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21011020202012 its reverse (21020202011012), we get a palindrome (42031222213024).

The spelling of 21011020202012 in words is "twenty-one trillion, eleven billion, twenty million, two hundred two thousand, twelve".