221121231043 has 4 divisors (see below), whose sum is σ = 221459855328. Its totient is φ = 220782606760.

The previous prime is 221121230969. The next prime is 221121231049. The reversal of 221121231043 is 340132121122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221121231043 - 2⁹ = 221121230531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121231049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169311163 + ... + 169312468.

It is an arithmetic number, because the mean of its divisors is an integer number (55364963832).

Almost surely, 2^221121231043 is an apocalyptic number.

221121231043 is a deficient number, since it is larger than the sum of its proper divisors (338624285).

221121231043 is an equidigital number, since it uses as much as digits as its factorization.

221121231043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338624284.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 221121231043 its reverse (340132121122), we get a palindrome (561253352165).

The spelling of 221121231043 in words is "two hundred twenty-one billion, one hundred twenty-one million, two hundred thirty-one thousand, forty-three".