4251221029 has 8 divisors (see below), whose sum is σ = 4663320480. Its totient is φ = 3843392400.

The previous prime is 4251221027. The next prime is 4251221033. The reversal of 4251221029 is 9201221524.

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

It is a cyclic number.

It is not a de Polignac number, because 4251221029 - 2¹ = 4251221027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4251220988 and 4251221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251221027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065619 + ... + 1069600.

It is an arithmetic number, because the mean of its divisors is an integer number (582915060).

Almost surely, 2^4251221029 is an apocalyptic number.

It is an amenable number.

4251221029 is a deficient number, since it is larger than the sum of its proper divisors (412099451).

4251221029 is a wasteful number, since it uses less digits than its factorization.

4251221029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135411.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 4251221029 is about 65201.3882444231. The cubic root of 4251221029 is about 1619.9610097053.

The spelling of 4251221029 in words is "four billion, two hundred fifty-one million, two hundred twenty-one thousand, twenty-nine".