21202122100312 has 32 divisors (see below), whose sum is σ = 40696627308480. Its totient is φ = 10349907996960.

The previous prime is 21202122100297. The next prime is 21202122100339. The reversal of 21202122100312 is 21300122120212.

It is a self number, because there is not a number n which added to its sum of digits gives 21202122100312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12967614 + ... + 14510797.

It is an arithmetic number, because the mean of its divisors is an integer number (1271769603390).

Almost surely, 2^{21202122100312} is an apocalyptic number.

It is an amenable number.

21202122100312 is a deficient number, since it is larger than the sum of its proper divisors (19494505208168).

21202122100312 is a wasteful number, since it uses less digits than its factorization.

21202122100312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27480703 (or 27480699 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21202122100312 its reverse (21300122120212), we get a palindrome (42502244220524).

The spelling of 21202122100312 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-two million, one hundred thousand, three hundred twelve".