21120230120212 has 48 divisors (see below), whose sum is σ = 37986057043648. Its totient is φ = 10267475811840.

The previous prime is 21120230120189. The next prime is 21120230120287. The reversal of 21120230120212 is 21202103202112.

It is a self number, because there is not a number n which added to its sum of digits gives 21120230120212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1472093623 + ... + 1472107969.

Almost surely, 2^{21120230120212} is an apocalyptic number.

It is an amenable number.

21120230120212 is a deficient number, since it is larger than the sum of its proper divisors (16865826923436).

21120230120212 is a wasteful number, since it uses less digits than its factorization.

21120230120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20696 (or 20694 counting only the distinct ones).

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

Adding to 21120230120212 its reverse (21202103202112), we get a palindrome (42322333322324).

The spelling of 21120230120212 in words is "twenty-one trillion, one hundred twenty billion, two hundred thirty million, one hundred twenty thousand, two hundred twelve".