21011311202012 has 48 divisors (see below), whose sum is σ = 37118447880192. Its totient is φ = 10406532280320.

The previous prime is 21011311201901. The next prime is 21011311202059. The reversal of 21011311202012 is 21020211311012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652448303 + ... + 652480505.

It is an arithmetic number, because the mean of its divisors is an integer number (773300997504).

Almost surely, 2^{21011311202012} is an apocalyptic number.

It is an amenable number.

21011311202012 is a deficient number, since it is larger than the sum of its proper divisors (16107136678180).

21011311202012 is a wasteful number, since it uses less digits than its factorization.

21011311202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35978 (or 35976 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21011311202012 its reverse (21020211311012), we get a palindrome (42031522513024).

The spelling of 21011311202012 in words is "twenty-one trillion, eleven billion, three hundred eleven million, two hundred two thousand, twelve".