21303211232212 has 24 divisors (see below), whose sum is σ = 45883839577856. Its totient is φ = 8427644003808.

The previous prime is 21303211232201. The next prime is 21303211232263. The reversal of 21303211232212 is 21223211230312.

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, 29262652428 + ... + 29262653155.

Almost surely, 2^{21303211232212} is an apocalyptic number.

It is an amenable number.

21303211232212 is an abundant number, since it is smaller than the sum of its proper divisors (24580628345644).

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

21303211232212 is a wasteful number, since it uses less digits than its factorization.

21303211232212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58525305607 (or 58525305605 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21303211232212 its reverse (21223211230312), we get a palindrome (42526422462524).

The spelling of 21303211232212 in words is "twenty-one trillion, three hundred three billion, two hundred eleven million, two hundred thirty-two thousand, two hundred twelve".