221230122123 has 32 divisors (see below), whose sum is σ = 306239864832. Its totient is φ = 141955783200.

The previous prime is 221230122121. The next prime is 221230122137. The reversal of 221230122123 is 321221032122.

It is not a de Polignac number, because 221230122123 - 2¹ = 221230122121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221230122123.

It is not an unprimeable number, because it can be changed into a prime (221230122121) 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, 22590358 + ... + 22600148.

It is an arithmetic number, because the mean of its divisors is an integer number (9569995776).

Almost surely, 2^221230122123 is an apocalyptic number.

221230122123 is a deficient number, since it is larger than the sum of its proper divisors (85009742709).

221230122123 is a wasteful number, since it uses less digits than its factorization.

221230122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12375.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221230122123 its reverse (321221032122), we get a palindrome (542451154245).

Subtracting 221230122123 from its reverse (321221032122), we obtain a palindrome (99990909999).

The spelling of 221230122123 in words is "two hundred twenty-one billion, two hundred thirty million, one hundred twenty-two thousand, one hundred twenty-three".