21011204224466 has 8 divisors (see below), whose sum is σ = 31518947031984. Its totient is φ = 10504888547140.

The previous prime is 21011204224457. The next prime is 21011204224513. The reversal of 21011204224466 is 66442240211012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 356745740 + ... + 356804631.

It is an arithmetic number, because the mean of its divisors is an integer number (3939868378998).

Almost surely, 2^{21011204224466} is an apocalyptic number.

21011204224466 is a deficient number, since it is larger than the sum of its proper divisors (10507742807518).

21011204224466 is a wasteful number, since it uses less digits than its factorization.

21011204224466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713565096.

The product of its (nonzero) digits is 36864, while the sum is 35.

Adding to 21011204224466 its reverse (66442240211012), we get a palindrome (87453444435478).

The spelling of 21011204224466 in words is "twenty-one trillion, eleven billion, two hundred four million, two hundred twenty-four thousand, four hundred sixty-six".