21224010452246 has 24 divisors (see below), whose sum is σ = 37075484347056. Its totient is φ = 9085749645840.

The previous prime is 21224010452221. The next prime is 21224010452263. The reversal of 21224010452246 is 64225401042212.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121993985 + ... + 122167836.

It is an arithmetic number, because the mean of its divisors is an integer number (1544811847794).

Almost surely, 2^{21224010452246} is an apocalyptic number.

21224010452246 is a deficient number, since it is larger than the sum of its proper divisors (15851473894810).

21224010452246 is a wasteful number, since it uses less digits than its factorization.

21224010452246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244162724 (or 244162717 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 35.

Adding to 21224010452246 its reverse (64225401042212), we get a palindrome (85449411494458).

The spelling of 21224010452246 in words is "twenty-one trillion, two hundred twenty-four billion, ten million, four hundred fifty-two thousand, two hundred forty-six".