21341235212 has 48 divisors (see below), whose sum is σ = 41946508800. Its totient is φ = 9416246400.

The previous prime is 21341235211. The next prime is 21341235229. The reversal of 21341235212 is 21253214312.

It is not an unprimeable number, because it can be changed into a prime (21341235211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329273 + ... + 388719.

It is an arithmetic number, because the mean of its divisors is an integer number (873885600).

Almost surely, 2^21341235212 is an apocalyptic number.

21341235212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21341235212 is a deficient number, since it is larger than the sum of its proper divisors (20605273588).

21341235212 is a wasteful number, since it uses less digits than its factorization.

21341235212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59702 (or 59700 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

Adding to 21341235212 its reverse (21253214312), we get a palindrome (42594449524).

The spelling of 21341235212 in words is "twenty-one billion, three hundred forty-one million, two hundred thirty-five thousand, two hundred twelve".