221202250421 has 8 divisors (see below), whose sum is σ = 222244153824. Its totient is φ = 220162434480.

The previous prime is 221202250369. The next prime is 221202250439. The reversal of 221202250421 is 124052202122.

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 221202250421 - 2¹⁸ = 221201988277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202256421) 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, 309230 + ... + 733503.

It is an arithmetic number, because the mean of its divisors is an integer number (27780519228).

Almost surely, 2^221202250421 is an apocalyptic number.

It is an amenable number.

221202250421 is a deficient number, since it is larger than the sum of its proper divisors (1041903403).

221202250421 is a wasteful number, since it uses less digits than its factorization.

221202250421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043731.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 221202250421 its reverse (124052202122), we get a palindrome (345254452543).

The spelling of 221202250421 in words is "two hundred twenty-one billion, two hundred two million, two hundred fifty thousand, four hundred twenty-one".