21227103412 has 24 divisors (see below), whose sum is σ = 37512394920. Its totient is φ = 10509402240.

The previous prime is 21227103379. The next prime is 21227103421. The reversal of 21227103412 is 21430172212.

It can be written as a sum of positive squares in 4 ways, for example, as 3411260836 + 17815842576 = 58406^2 + 133476^2 .

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 698862 + ... + 728602.

It is an arithmetic number, because the mean of its divisors is an integer number (1563016455).

Almost surely, 2^21227103412 is an apocalyptic number.

It is an amenable number.

21227103412 is a deficient number, since it is larger than the sum of its proper divisors (16285291508).

21227103412 is a wasteful number, since it uses less digits than its factorization.

21227103412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31491 (or 31489 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 21227103412 its reverse (21430172212), we get a palindrome (42657275624).

The spelling of 21227103412 in words is "twenty-one billion, two hundred twenty-seven million, one hundred three thousand, four hundred twelve".