421221032243 has 32 divisors (see below), whose sum is σ = 492597780480. Its totient is φ = 355928488960.

The previous prime is 421221032179. The next prime is 421221032257. The reversal of 421221032243 is 342230122124.

It is not a de Polignac number, because 421221032243 - 2⁶ = 421221032179 is a prime.

It is a super-2 number, since 2×421221032243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421221032273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14348246 + ... + 14377572.

It is an arithmetic number, because the mean of its divisors is an integer number (15393680640).

Almost surely, 2^421221032243 is an apocalyptic number.

421221032243 is a deficient number, since it is larger than the sum of its proper divisors (71376748237).

421221032243 is a wasteful number, since it uses less digits than its factorization.

421221032243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30307.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 421221032243 its reverse (342230122124), we get a palindrome (763451154367).

The spelling of 421221032243 in words is "four hundred twenty-one billion, two hundred twenty-one million, thirty-two thousand, two hundred forty-three".