4249351329921 has 12 divisors (see below), whose sum is σ = 6138736626048. Its totient is φ = 2832538715064.

The previous prime is 4249351329907. The next prime is 4249351329953. The reversal of 4249351329921 is 1299231539424.

4249351329921 is a `hidden beast` number, since 4 + 249 + 3 + 51 + 329 + 9 + 21 = 666.

It is not a de Polignac number, because 4249351329921 - 2⁶ = 4249351329857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4249351329961) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 30106645 + ... + 30247458.

It is an arithmetic number, because the mean of its divisors is an integer number (511561385504).

Almost surely, 2^{4249351329921} is an apocalyptic number.

It is an amenable number.

4249351329921 is a deficient number, since it is larger than the sum of its proper divisors (1889385296127).

4249351329921 is a wasteful number, since it uses less digits than its factorization.

4249351329921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60361932 (or 60361929 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 4249351329921 in words is "four trillion, two hundred forty-nine billion, three hundred fifty-one million, three hundred twenty-nine thousand, nine hundred twenty-one".