221202857021 has 8 divisors (see below), whose sum is σ = 221373252960. Its totient is φ = 221032531728.

The previous prime is 221202857011. The next prime is 221202857063. The reversal of 221202857021 is 120758202122.

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 221202857021 - 2⁶ = 221202856957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202857011) 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, 7391330 + ... + 7421196.

It is an arithmetic number, because the mean of its divisors is an integer number (27671656620).

Almost surely, 2^221202857021 is an apocalyptic number.

It is an amenable number.

221202857021 is a deficient number, since it is larger than the sum of its proper divisors (170395939).

221202857021 is a wasteful number, since it uses less digits than its factorization.

221202857021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35323.

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 221202857021 in words is "two hundred twenty-one billion, two hundred two million, eight hundred fifty-seven thousand, twenty-one".