21344165212 has 12 divisors (see below), whose sum is σ = 37375896096. Its totient is φ = 10665337760.

The previous prime is 21344165179. The next prime is 21344165239. The reversal of 21344165212 is 21256144312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679089 + ... + 1691752.

It is an arithmetic number, because the mean of its divisors is an integer number (3114658008).

Almost surely, 2^21344165212 is an apocalyptic number.

It is an amenable number.

21344165212 is a deficient number, since it is larger than the sum of its proper divisors (16031730884).

21344165212 is a wasteful number, since it uses less digits than its factorization.

21344165212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372428 (or 3372426 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The spelling of 21344165212 in words is "twenty-one billion, three hundred forty-four million, one hundred sixty-five thousand, two hundred twelve".