21012124222412 has 48 divisors (see below), whose sum is σ = 37706399216640. Its totient is φ = 10239912496128.

The previous prime is 21012124222403. The next prime is 21012124222559. The reversal of 21012124222412 is 21422242121012.

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 15 ways as a sum of consecutive naturals, for example, 902609789 + ... + 902633067.

It is an arithmetic number, because the mean of its divisors is an integer number (785549983680).

Almost surely, 2^{21012124222412} is an apocalyptic number.

It is an amenable number.

21012124222412 is a deficient number, since it is larger than the sum of its proper divisors (16694274994228).

21012124222412 is a wasteful number, since it uses less digits than its factorization.

21012124222412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34262 (or 34260 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 21012124222412 its reverse (21422242121012), we get a palindrome (42434366343424).

The spelling of 21012124222412 in words is "twenty-one trillion, twelve billion, one hundred twenty-four million, two hundred twenty-two thousand, four hundred twelve".