21949472212 has 12 divisors (see below), whose sum is σ = 38413120480. Its totient is φ = 10974294936.

The previous prime is 21949472203. The next prime is 21949472269. The reversal of 21949472212 is 21227494912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18313 + ... + 210319.

Almost surely, 2^21949472212 is an apocalyptic number.

It is an amenable number.

21949472212 is a deficient number, since it is larger than the sum of its proper divisors (16463648268).

21949472212 is a wasteful number, since it uses less digits than its factorization.

21949472212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220590 (or 220588 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The spelling of 21949472212 in words is "twenty-one billion, nine hundred forty-nine million, four hundred seventy-two thousand, two hundred twelve".