21222546412 has 48 divisors (see below), whose sum is σ = 38387986560. Its totient is φ = 10260836352.

The previous prime is 21222546409. The next prime is 21222546421. The reversal of 21222546412 is 21464522212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16362148 + ... + 16363444.

It is an arithmetic number, because the mean of its divisors is an integer number (799749720).

Almost surely, 2^21222546412 is an apocalyptic number.

It is an amenable number.

21222546412 is a deficient number, since it is larger than the sum of its proper divisors (17165440148).

21222546412 is a wasteful number, since it uses less digits than its factorization.

21222546412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410 (or 2408 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The spelling of 21222546412 in words is "twenty-one billion, two hundred twenty-two million, five hundred forty-six thousand, four hundred twelve".