21323302012212 has 24 divisors (see below), whose sum is σ = 50267303028096. Its totient is φ = 7034491385088.

The previous prime is 21323302012171. The next prime is 21323302012237. The reversal of 21323302012212 is 21221020332312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9159492828 + ... + 9159495155.

It is an arithmetic number, because the mean of its divisors is an integer number (2094470959504).

Almost surely, 2^{21323302012212} is an apocalyptic number.

It is an amenable number.

21323302012212 is an abundant number, since it is smaller than the sum of its proper divisors (28944001015884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323302012212 is a wasteful number, since it uses less digits than its factorization.

21323302012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18318988087 (or 18318988085 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21323302012212 its reverse (21221020332312), we get a palindrome (42544322344524).

The spelling of 21323302012212 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred two million, twelve thousand, two hundred twelve".